Database Users

BOSION ANDROID 4.4.2 head unit

i edited this since the unit is identified and i see that a lot of this units are being sold right now. the goal is to people post firmwares for the unit, root methods, mcus...etc.
my unit in the seller description is described as a dual core. altough, when i received, the system is the same, as you can see in the pictures below, but hardware shows a quadcore cortex A7.
many people achived root with kingoroot.
my unit, per example, wont gain root. ive tried every root app i can remember. with kingoroot, it reaches 90% and it freezes and reboot. also, sometimes when it boots, radio and music app have force close erros and i have to reboot the unit.
people that have root, can you access the mcu.bin and post it here?
EDIT
____________________________________________________
this unit is being sold both in dual core allwinner t2 and quadcore allwinner t3
in the dual core the root can be achived with kingroot or kingoroot apk.
in the quadcore, my case, no root method has been found. i cant connect the unit to the pc so can only try the android versions.
below are firmwares for the dual core and quadcore.
MCU update guide for both models - put the mcu.bin in the root of micro sd card, insert in the unit. a pop up will appear asking for update the mcu, just click ok and let it finish.
updating the full fw. all firmwares come with phoenixcard. open phoenixcard, slect your microsd drive letter, select format to normal, press ok, select image and press burn. after that, turn off unit insert micro sd and turn on unit. it will upgrade. when it finish, black screen will appear, turn off unit, remove card and turn on.
NOTE - everytime i tried to burn the img with phoenixcard in the internalcard reader, i got errors. both in deskptop and laptop. had to use external card reader.
Dual Core FW and MCU
fw may 2016 - https://yadi.sk/d/Eo2U4zfFtXFh6
mcu - https://yadi.sk/d/C5AQ1mOHtWSxu
QuadCore FW and MCU from 09/09/2016
FW - https://mega.nz/#!X50HQS7Q!V6fYDvRY1g_l8epyyxy4GH2mITGRS_1BRCBbc4-IyKI
MCU - https://mega.nz/#!H01jzAIY!GQJzSudDi632ThLsIb5H-IGU1-6sHkyUPzjg7Rwbcu0
video instructions included
________________________________________________________________________________________________________________
Secret Menu tested on quadcore instructions.
go to settings, about device and tap kernel, tap os version, tap kernel, tap os version, tap kernel, tap os version. factory settings menu will apeear. three times each, intercaleted. this have to be accessed because some people after flashing fw, the radio fm app doesnt work so you have to go here and select radio model 7786

{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

that launcher looks kind of cool.
I have no idea what it is, but there seems to be a lot of questions like this recently. Where do you all get these head units that you have no idea what they are?

looks like a bosion. i have the same one. root is available. i rooted with kingo root universal method. I'm hoping to find out how to upgade to 5.1 or install a custom rom. If you want to change the look, nova launcher works without crash, dont install apex
---------- Post added at 03:08 PM ---------- Previous post was at 02:59 PM ----------
pnonu23 said:
looks like a bosion. i have the same one. root is available. i rooted with kingo root universal method. I'm hoping to find out how to upgade to 5.1 or install a custom rom. If you want to change the look, nova launcher works without crash, dont install apex
Click to expand...
Click to collapse
also for some reason gmaps works on this 4.4 device with voice recognition so I deleted IGO cause it rearely boots if my flash drive is in. FM radio on my unit doesnt cut off. also freezes when i plug my 2tb hd up to usb. runs kodi and youtube flawlass tho. just wish small makers like this quit locking down their android products and open up support pages. I too was trying to get usb debugg to work but they locked the developers option

pnonu23 said:
looks like a bosion. i have the same one. root is available. i rooted with kingo root universal method. I'm hoping to find out how to upgade to 5.1 or install a custom rom. If you want to change the look, nova launcher works without crash, dont install apex
---------- Post added at 03:08 PM ---------- Previous post was at 02:59 PM ----------
also for some reason gmaps works on this 4.4 device with voice recognition so I deleted IGO cause it rearely boots if my flash drive is in. FM radio on my unit doesnt cut off. also freezes when i plug my 2tb hd up to usb. runs kodi and youtube flawlass tho. just wish small makers like this quit locking down their android products and open up support pages. I too was trying to get usb debugg to work but they locked the developers option
Click to expand...
Click to collapse
mine sometimes when it boots, i have to flash the mcu i found on the web. this because the radio app and the music app force close. can anyone provide MCUS for this unit?
kingo root doenst work on mine. its reaches 90%, the unit freezes and reboot

people that have root, can you access the mcu.bin and post it here?

nosidefcp said:
people that have root, can you access the mcu.bin and post it here?
Click to expand...
Click to collapse
dont know what you want done, but i can help if you tell me how to do it. Dont know how to access a mcu.bin.
In the meantime i have a 1.15 update file with instructions on how to update, that the seller sent me, if anyone is interested. I'm a noob to these mcu boxes.

pnonu23 said:
dont know what you want done, but i can help if you tell me how to do it. Dont know how to access a mcu.bin.
In the meantime i have a 1.15 update file with instructions on how to update, that the seller sent me, if anyone is interested. I'm a noob to these mcu boxes.
Click to expand...
Click to collapse
hi. thank you for being available. I don't know if the mcu.bin file is stored somewhere but I know for sure that without rot, I cant find it. my hope is that if you have root access, with root explorer you can find the file. so please download root explorer and then, with the search option just type mcu and/or mcu.bin and see if root explorer find that file. if yes, please upload it here. let me know

nosidefcp said:
hi. thank you for being available. I don't know if the mcu.bin file is stored somewhere but I know for sure that without rot, I cant find it. my hope is that if you have root access, with root explorer you can find the file. so please download root explorer and then, with the search option just type mcu and/or mcu.bin and see if root explorer find that file. if yes, please upload it here. let me know
Click to expand...
Click to collapse
hello ,
i have the same head unit and had problems with it .
so i got an update from the seller . mcu.bin.
extract the mcu , put it on a sdcard
and insert the card in the unit.

so anyone found a root method for the quadcore model? i have a new fw and new mcu from 09/09 all working fine but i wanna remove the radio app and install another, but tat just with root...kingo and kingroot doesnt work

nosidefcp said:
so anyone found a root method for the quadcore model? i have a new fw and new mcu from 09/09 all working fine but i wanna remove the radio app and install another, but tat just with root...kingo and kingroot doesnt work
Click to expand...
Click to collapse
can you post your MCU ?

Not sure if this is the place but I'm having issues getting the head unit to pair with the OBDII . When I scan it can be found , it says tap to pair and it does nothing. Also, A Bluetooth scan shows something there in Chinese characters. I remove it and it keeps coming back. there IS NOT A LOT I WOULD REALLY CHANGE ABOUT THE HEAD UNIT BUT I WANT TO USE MY obdii

Hi,
Do you know if the firmware you attached supports this?
m.es.aliexpress.com/item/32669808886.html

antonio2k said:
Hi,
Do you know if the firmware you attached supports this?
m.es.aliexpress.com/item/32669808886.html
Click to expand...
Click to collapse
yes it does. just check when the unit arrives if its the quad or dual core and choose the fw

Hi,
i have a quad core. But no root.
can you tell me how i can root?
This is my Head Unit
ww w.aliexpress.com/item/Quad-Core-Android-4-4-car-dvd-player-gps-2Din-7-Inch-For-Volkswagen-VW-Skoda/32321954979.html?spm=2114.13010608.0.0.0RlJVJ
With Android 4.4.2

shatch said:
Not sure if this is the place but I'm having issues getting the head unit to pair with the OBDII . When I scan it can be found , it says tap to pair and it does nothing. Also, A Bluetooth scan shows something there in Chinese characters. I remove it and it keeps coming back. there IS NOT A LOT I WOULD REALLY CHANGE ABOUT THE HEAD UNIT BUT I WANT TO USE MY obdii
Click to expand...
Click to collapse
Hi there, I've bought a wifi odb2 scanner from eBay which seems to work, I also had an issue with my Bluetooth scanner not working.
Apart from that the player is actually ok, I would like to root, though. For instance, I'd like to change the default music player to poweramp or something similar so that when I press the hardware buttons on the side poweramp comes on instead of the pre-installed garbage.

some unit same problems
hello i have the exact same unit but app versio 2.1 mcu 1.12 some was talkin about the 1.15
and wath about root ?? any news?? also have the same bluethoot problem only pairs with phones
tanks every one
also ...
found this on rooting allwiner
this is a copy from theregister site
This is what a root debug backdoor in a Linux kernel looks like
Allwinner's all-loser code makes it into shipped firmware
reddit Twitter Facebook linkedin 159
9 May 2016 at 23:20, Richard Chirgwin
A root backdoor for debugging ARM-powered Android gadgets managed to end up in shipped firmware – and we're surprised this sort of colossal blunder doesn't happen more often.
The howler is the work of Chinese ARM SoC-maker Allwinner, which wrote its own kernel code underneath a custom Android build for its devices.
Its Linux 3.4-based kernel code, on Github here, contains what looks to The Register like a debug mode the authors forgot to kill. Although it doesn't appear to have made it into the mainstream kernel source, it was picked up by firmware builders for various gadgets using Allwinner's chips.
It's triggered by writing rootmydevice to the special file /proc/sunxi_debug/sunxi_debug. That gives the current running process root privileges. If that file is present on your device or single-board computer, then you need to get rid of it. This is the code that checks for the magic write:
if(!strncmp("rootmydevice",(char*)buf,12)){
cred = (struct cred *)__task_cred(current);
cred->uid = 0;
cred->gid = 0;
cred->suid = 0;
cred->euid = 0;
cred->euid = 0;
cred->egid = 0;
cred->fsuid = 0;
cred->fsgid = 0;
printk("now you are root\n");
}
Tkaiser, a moderator over at the forums of the Armbian operating system (a Linux distro for ARM-based development boards) notes there's a number of vulnerable systems in the field.
As tkaiser writes, echo "rootmydevice" > /proc/sunxi_debug/sunxi_debug "from any process with any UID will get root, and it's probably remotely exploitable if combined with networked services that might allow access to /proc."
He adds: “This security flaw is currently present in every OS image for H3, A83T or H8 devices that rely on kernel 3.4.”
As well as all Orange Pi images except for Armbian's freshly patched 5.10, these vulnerable gadgets include ARM dev boards from FriendlyARM, SinoVoip (its M2+ and M3 Banana Pi boards), Cubietruck, and LinkSprite's pcDuino8 Uno.
There are probably other products out there using the Allwinner
any one knows if its possible it works for us ??

Hello,
Do you have any news about the root of the Bx-411 t3?
Thanks!

Similar problems
I have the quad core model. No access to root as of yet. The seller sent me an upgrade file which doesn't boot. I can't seem to find anyway to make my i-bus work for the steering controls.
Anyone considered windows 7 ?

MCU version of Erisin ES6292B 9" PX6???

I received an Erisin ES6292B 9" PX6 for Mercedes Benz.
I don't know why but for some reason I was sure it was a MTCD/E version so without prior checking, I immediately went for the upgrade to Hal9K MOD.
The upgrade finished and the unit rebooted. I am not sure if I saw the boot logo (I think not) but as if this was not enough, during first boot, someone in the workshop cut the power to the car and the unit was bricked!
I wrote to Erisin and they sent me the Stock image to try to apply from recovery. However it is impossible to enter recovery with any way I tried. As long as I hold the reset button the unit is dead. When I release it the backlit starts but the screen remains black even after 10 minutes. No recovery, not even boot logo! It seems the MCU firmware is corrupted.
At the moment I have an ST-LINK/V2 programmer in my hands to go for unbricking with Wadzio method but STILL NO ANSWER FROM ERISIN IF MY UNIT IS MTCD/E or different.
Anyone knows?
Also, anyone knows a direct link to download recovery.bin for my unit?

What are the names of the files that were being applied for upgrade? Are you able to share these - assume you had two files, one MCU and the other android.
Also the stock image ersin supplied.
Note the wadzio Unbrick is for MCU unbricking, are you sure that the MCU is bricked? I.e. you are sure you were upgrading the MCU, because from your description, sounds like you were upgrading the SOM/Android.
Details are everything.

marchnz said:
What are the names of the files that were being applied for upgrade? Are you able to share these - assume you had two files, one MCU and the other android.
Also the stock image ersin supplied.
Note the wadzio Unbrick is for MCU unbricking, are you sure that the MCU is bricked? I.e. you are sure you were upgrading the MCU, because from your description, sounds like you were upgrading the SOM/Android.
Details are everything.
Click to expand...
Click to collapse
This is the link to the Hal9k PX6 Custom ROM
This is the link to my unit's stock ROM
I assume my MCU is bricked because I cannot enter recovery

When there is no boot logo, I guess it is the MCU. Correct?

aphilgr1 said:
When there is no boot logo, I guess it is the MCU. Correct?
Click to expand...
Click to collapse
Not necessarily, no.

aphilgr1 said:
This is the link to the Hal9k PX6 Custom ROM
This is the link to my unit's stock ROM
I assume my MCU is bricked because I cannot enter recovery
Click to expand...
Click to collapse
The zip doesn't contain an MCU, and is an android OTA zip, therefore if your power outage occurred while applying this file, the SOM emmc/nand is probably corrupt, and you might not be able to enter recovery.
I've had a number of SOMs sent to me exhibiting the same symptom, so not uncommon.
If unable to SDCard boot, SOM recovery via OTG is the likely path to recovery. Refer my threads/signature.

marchnz said:
The zip doesn't contain an MCU, and is an android OTA zip, therefore if your power outage occurred while applying this file, the SOM emmc/nand is probably corrupt, and you might not be able to enter recovery.
I've had a number of SOMs sent to me exhibiting the same symptom, so not uncommon.
If unable to SDCard boot, SOM recovery via OTG is the likely path to recovery. Refer my threads/signature.
Click to expand...
Click to collapse
I still have not managed to find out if my MCU version is MTCD/E or other. Still waiting for Erisin's response. They requested a video with symptoms which I already sent.
Supposedly my MCU's version is an STM32 and I tried to install Hal9k's ROM (specific for MTCD/E) wouldn't that corrupt the MCU? To my thinking, this is the most probable scenario.

aphilgr1 said:
I still have not managed to find out if my MCU version is MTCD/E or other. Still waiting for Erisin's response. They requested a video with symptoms which I already sent.
Supposedly my MCU's version is an STM32 and I tried to install Hal9k's ROM (specific for MTCD/E) wouldn't that corrupt the MCU? To my thinking, this is the most probable scenario.
Click to expand...
Click to collapse
The files you list are not MCU updates.
Its trivial to determine if you have an MTCD MCU using Wadzio's decryption tool, however & once again, the MCU is separate to Android. You cannot flash the "wrong" platform MCU (ie. MTCD vs STM MCU) in recovery.
Once again; the files you list are ANDROID and not MCU. Unless you havent described what you were doing to "upgrade" the unit, which lead to corruption; the SOM is bricked and not MCU.
Again, for clarity, MCU and ANDROID are not the same. They are separate images and cannot be flashed together.

marchnz said:
Once again; the files you list are ANDROID and not MCU. Unless you havent described what you were doing to "upgrade" the unit, which lead to corruption; the SOM is bricked and not MCU.
Click to expand...
Click to collapse
Kind of getting there. Ha ha, my knowledge is very epidermic! Tomorrow I ll try the SOM recovery via OTG as you suggested and report. Thanks for your time

Just a (silly?) question: Could we say MCU is equivalent to bios on a PC and Android is the equivalent to PC OS? If the MCU (=bios) is still untouched, even with Android (=PC OS) corrupted, why is it impossible to boot from SD or simply access recovery?

aphilgr1 said:
This is the link to the Hal9k PX6 Custom ROM
This is the link to my unit's stock ROM
I assume my MCU is bricked because I cannot enter recovery
Click to expand...
Click to collapse
Hello. | have an Erisin ES6283C 8" Android 9.0 Car Stereo DAB+ 4G WiFi HDMI GPS Sat Nav for Mercedes C/CLK/CLC Class W203 W209.
They (Erisin) provided me the same stock ROM as yours.
For sure your MCU is STM32, as mine.

aphilgr1 said:
Just a (silly?) question: Could we say MCU is equivalent to bios on a PC and Android is the equivalent to PC OS? If the MCU (=bios) is still untouched, even with Android (=PC OS) corrupted, why is it impossible to boot from SD or simply access recovery?
Click to expand...
Click to collapse
The MCU is more like say an auxillary fan and button controller, connected to a serial port, but still controlling the power supply to the computer.
Why impossible to boot or access recovery - corrupt emmc/nand.
Your unit doesnt look like an MTCD/E device.

Unfortunately hardware used in my PX6 implementation is quite different from what shown in SOM recovery over OTG page. I don't have the tools needed to uncover the SOM (75W soldering etc). Judging from the bottom, it seems the SOM is embedded on the mainboard and there may not be any pins accessible. However, rk3399 supports what is called MaskRom mode (a relevant link translated from Chinese) allowing programming of the SOM with the use of a male to male usb cable. But this would be possible only if we access the interior and find that the test points to bridge exist. My last resort if nothing else is possible.
Another issue I am facing is that my firmware is not in update.img format but comes in .zip split in several files. I think I need to repack it in .img format in order to be able to program my unit with existing tools and I don't know how
Just a last (stupid?) question. Accessing the MCU via ST-LINK/V2 programmer is possible. If we new the starting memory address of the SOM firmware or the various parts, would it be possible to flash from there?

florynn2003 said:
Hello. | have an Erisin ES6283C 8" Android 9.0 Car Stereo DAB+ 4G WiFi HDMI GPS Sat Nav for Mercedes C/CLK/CLC Class W203 W209.
They (Erisin) provided me the same stock ROM as yours.
For sure your MCU is STM32, as mine.
Click to expand...
Click to collapse
It is an STM32 eventually. I managed to unbrick it but the MCU was changed. Both firmware and config. I am stuck with an 800X480 desktop on a 1024X600 display.
Can you export your MCU.cfg file and send it to me please? I think you need to go to settings/about then toggle between Kernel Version and OS Version 6 times in total to enter hidden menu. If a password is asked, try 666666 or 123456. From there you can go down and select export config.
Thanks in advance!

aphilgr1 said:
It is an STM32 eventually. I managed to unbrick it but the MCU was changed. Both firmware and config. I am stuck with an 800X480 desktop on a 1024X600 display.
Can you export your MCU.cfg file and send it to me please? I think you need to go to settings/about then toggle between Kernel Version and OS Version 6 times in total to enter hidden menu. If a password is asked, try 666666 or 123456. From there you can go down and select export config.
Thanks in advance!
Click to expand...
Click to collapse
I tried to export config data (is the only export in the menu) and it's only a 1KB file. I think it's the config only for HU startup. I searched all the settings (including the Hidden section) and I have nothing to export the MCU config.

florynn2003 said:
I tried to export config data (is the only export in the menu) and it's only a 1KB file. I think it's the config only for HU startup. I searched all the settings (including the Hidden section) and I have nothing to export the MCU config.
Click to expand...
Click to collapse
This is exactly what I am looking for. Can you share please?

aphilgr1 said:
This is exactly what I am looking for. Can you share please?
Click to expand...
Click to collapse
here you go

Wondering if you managed to fix your HU? Also, what rom did you settle on?
Also, is that blue material on your HU metal or painted plastic?

lachlan102 said:
Wondering if you managed to fix your HU? Also, what rom did you settle on?
Also, is that blue material on your HU metal or painted plastic?
Click to expand...
Click to collapse
https://forum.xda-developers.com/showpost.php?p=81930477&postcount=100

Hi! Dumb question: I own an Erisin ES7802B which came with Android 8.0, where can I check or find if I can update my product? Thanks in advance!

[GUIDE] Android 6 SUPERMOD for YT9213AJ, YT9216B, YT9217B, YT9218CH - root, Viper4Android, TWRP, custom UI, brick recovery and more

Hi all,
If you want to greatly improve the way your head unit works, sounds and looks like - you've come to the right place!
Why install this?​With any of these packages you will greatly improve:
Stability
Speed
User Interface
Sound tweaking options
Customization options
We wanted to share these all-in-one software packages with you, that we put together using various sources as well as our own modifications for Chinese Android Head units with 1Gb RAM and 16Gb FLASH drive, no physical buttons, with screen resolution of 1024x600 px. (It will not work on Tesla-style units):
YT9213AJ (with Audio Chip types: TDA, CSC or SCS)
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
​
YT9216B & YT9217B (same package)​
YT9218CH​
Disclaimer
We do not create the software itself but rather use research and put together different mods and hacks into one package that includes very user-friendly step-by-step instructions on how to install it all. You will find the links to original posts in the instructions pdf's if credit is due. The software might include smaller changes made by me and has been fully tested in real units.
The Software Packages contain:​
YT9213AJ custom firmware
YT9216B/YT9217B custom firmware with split-screen option
YT9218CH custom firmware
ROOT (SuperSU)
TWRP Recovery
Viper4Android / Viper4A / ViperFX
Custom UI (Car Launcher)
Custom Boot Animation
!! TAKE A PICTURE OF YOUR SYSTEM INFO AND KERNEL VERSION BEFORE DOING ANYTHING TO YOUR HEAD UNIT !!​
!! ALWAYS BACKUP YOUR UNIT BEFORE MAKING ANY CHANGES TO IT !!​
DOWNLOAD #1
YT9213AJ (with audio chip) supermod package & drivers
DOWNLOAD #2
YT9216B & YT9217B supermod package and drivers
DOWNLOAD #3
YT9218CH supermod package and drivers
STEP-BY-STEP GUIDE (upgrading from working stock firmware):
DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER. STEPS 5 AND 6 ARE MOST CRITICAL.
Proceed to download the software package for your unit and the drivers package in the same folder
It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide
Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers.
Backup your current system by exporting a full memory dump. Video Guide
Import back your memory dump from step-5 to ensure it fully works. This is how.
Install the package. Separate instructions are included in every folder of the downloaded zip file. Follow them by the order.
IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE YOUR BACKUP AVAILABLE, follow the steps below:
DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER.
It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide
Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers - (download link is in the video description)
Watch this video on Test Point recovery
Import back your memory dump. This is how.
If successful - try to install the software package again or stay with your original one
IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE NO BACKUP AVAILABLE, follow the steps below:
Share the pictures of your System Info and Kernel in this thread and I'll try to help you
---------------------------------------
IF YOUR HEAD UNIT HAS PHYSICAL BUTTONS: this software has only been tested on head units with no physical buttons (like volume). Before making any changes, access the CAR SETTINGS -> FACTORY SETTINGS -> ENCODER SETTINGS on your head unit and take a screenshot of the current settings (see example below). After installing the package, go back to these settings and adjust them if needed. If that doesn't help and if you can't successfully re-calibrate the buttons after installing the firmware, restore your backup.
** IF YOU ARE UNABLE TO RESTORE YOUR UNIT, PLEASE CONSIDER DONATING IT TO US @ ExtremeMOD, SO WE CAN BUILD MORE MODS AND TUTORIALS​
---------------------------------------------------------
This post is being frequently updated and you'll find more guides and mods in our forum signature​---------------------------------------------------------
Thanks! And if this post is helpful to you please don't forget to "like" it.
[9213AJ][YT9213AJ][V4A][VIPER4ANDROID][ViperFX][ROOT][TWRP][8227L][YT9216B]

Hello, is it true Android 9.1 or fake based on 6.0 ?

It's 6.0 as most of these units and frankly that's the best version for the hardware otherwise it'll be really slow.

Hi,
Could you show us some screenshot / pictures how this Android look like?
How look the radio app?
Google maps run smoothly?

what exact brand and model is the hu? serial number would be helpful, also links to where to buy it

I have YT9213AJ car stereo 2 gb and 16 gb memory but it lost Google account and some app delete auto and Google account not support . When I formated / reset it again Google account working well but after update it also delet my google acoount and play store also delete what should I do now?

Sorry if this is off topic.
I have this same unit(purchased a week ago) and the music quality is very bad, very flat, system equalizer doesn't work, Volume 1 is too loud.
I have used viper before on phones connected to head units with great success. After viper is this unit now providing clear sound and bass? My setup is using factory amp.
I am still in my return window and wanted an opinion before rooting or sending it back.

Can you check if this image is latest, can you adapt your image based on this latest image, published on 2nd of November, it shows Android 9.1 and has kernel 4.4
gongban_YT9216BJ_ui1-hw-ota-v6.5.zip
http://file.xygala.com/?dir=uploads/XY公版/9216/9216BJ/Andriod_9.1/外文/横屏/1024X600/UI1_v6.5

How did you?
How did you install TWRP and Viper? my hu is 2/16..I tried to memory dump your rom but it say invalid lenght..
[
​QUOTE=iceblue1980;83842081]Hi all,
Wanted to share this MOD with you that I created for 8227L_demo Android Head unit, model: YT9213AJ with 1Gb RAM and 16Gb FLASH drive. You can use this to debrick your unit or to fully install the latest firmware (Aug2020) with fully working:
YT9213AJ_00011_V001_20200806
ROOT (SuperSU)
TWRP Recovery
Viper4Android / Viper4A / ViperFX
Scatter file (should work for any 8227L YT921xx device)
Full Memory Dump
Download link
How to use
Download the file and unzip it onto you PC hard drive
Make sure Mediatek drivers are correctly installed on your PC (you can view many guides here on XDA on how to properly install them)
Download FlashTool version 5.1824 (or you will get transfer errors with reading DRAM or Scatter file) - if this version doesn't work try other versions between v5.1736 and v5.1916
In Flash Tool, 'write to memory' both BOOT1 and ROM_USER file (search for instructions on XDA on ow to import memory dump) using the information from "Memory Map.txt" file (shows what memory values to type in when importing in the Flash Tool) and you will need USB-A cable for this. During this step make sure your head unit is completely disconnected from car battery or any other power source
When installation is complete (import can take roughly 20 min), restart the unit in TWRP Recovery mode (use the Shutdown app that came pre-installed with the mod) and in TWRP pick "Wipe Cache / Dalvik".
Done!
If you are doing brick recovery, you can follow the very same method with Test Point method also fully described here on XDA Forums.
Enjoy!
[9213AJ][YT9213AJ][V4A][VIPER4ANDROID][ViperFX][ROOT][TWRP][8227L][/QUOTE]

Can this work on 2Gb RAM / 32Gb ROM?
iceblue1980 said:
Hi all,
Wanted to share this MOD with you that I created for 8227L_demo Android Head unit, model: YT9213AJ with 1Gb RAM and 16Gb FLASH drive. You can use this to debrick your unit or to fully install the latest firmware (Aug2020) with fully working:
...
Click to expand...
Click to collapse
Hello!
I have a YT9213A (without last "J"), with 2Gb RAM and 32Gb ROM, and I wish to root it in order to change the radio app with a mod made by a 4pda member.
Can I root it without reflashing the entire firmware?
If not, will yours be compatible with my unit?
EDIT: PS: The download link is not working for me, please fix it.
Thanks in advance.

kamikazedc said:
Hello!
I have a YT9213A (without last "J"), with 2Gb RAM and 32Gb ROM, and I wish to root it in order to change the radio app with a mod made by a 4pda member.
Can I root it without reflashing the entire firmware?
If not, will yours be compatible with my unit?
EDIT: PS: The download link is not working for me, please fix it.
Thanks in advance.
Click to expand...
Click to collapse
Sorry I wouldn't recommend it.

kamikazedc said:
Hello!
I have a YT9213A (without last "J"), with 2Gb RAM and 32Gb ROM, and I wish to root it in order to change the radio app with a mod made by a 4pda member.
Can I root it without reflashing the entire firmware?
If not, will yours be compatible with my unit?
EDIT: PS: The download link is not working for me, please fix it.
Thanks in advance.
Click to expand...
Click to collapse
K4f said:
Hi,
Could you show us some screenshot / pictures how this Android look like?
How look the radio app?
Google maps run smoothly?
Click to expand...
Click to collapse
It's super fast. With this mod you can easily install custom radio app or use one included. Here is a video I made showcasing similar unit but with exactly the same software -

gorgutron said:
Sorry if this is off topic.
I have this same unit(purchased a week ago) and the music quality is very bad, very flat, system equalizer doesn't work, Volume 1 is too loud.
I have used viper before on phones connected to head units with great success. After viper is this unit now providing clear sound and bass? My setup is using factory amp.
I am still in my return window and wanted an opinion before rooting or sending it back.
Click to expand...
Click to collapse
Viper will improve the sound considerably however the main reason for poor sound quality in this unit is the built in amplifier chip which is YD7388 and is absolute crap. If you have basic soldering skills, replace it with TDA7850 and a 10000 UF 25V capacitor and together with Viper, your unit will sound like a very hi end head unit.

codecxbox said:
How did you install TWRP and Viper? my hu is 2/16..I tried to memory dump your rom but it say invalid lenght..
[
​QUOTE=iceblue1980;83842081]Hi all,
Wanted to share this MOD with you that I created for 8227L_demo Android Head unit, model: YT9213AJ with 1Gb RAM and 16Gb FLASH drive. You can use this to debrick your unit or to fully install the latest firmware (Aug2020) with fully working:
YT9213AJ_00011_V001_20200806
ROOT (SuperSU)
TWRP Recovery
Viper4Android / Viper4A / ViperFX
Scatter file (should work for any 8227L YT921xx device)
Full Memory Dump
Download link
How to use
Download the file and unzip it onto you PC hard drive
Make sure Mediatek drivers are correctly installed on your PC (you can view many guides here on XDA on how to properly install them)
Download FlashTool version 5.1824 (or you will get transfer errors with reading DRAM or Scatter file) - if this version doesn't work try other versions between v5.1736 and v5.1916
In Flash Tool, 'write to memory' both BOOT1 and ROM_USER file (search for instructions on XDA on ow to import memory dump) using the information from "Memory Map.txt" file (shows what memory values to type in when importing in the Flash Tool) and you will need USB-A cable for this. During this step make sure your head unit is completely disconnected from car battery or any other power source
When installation is complete (import can take roughly 20 min), restart the unit in TWRP Recovery mode (use the Shutdown app that came pre-installed with the mod) and in TWRP pick "Wipe Cache / Dalvik".
Done!
If you are doing brick recovery, you can follow the very same method with Test Point method also fully described here on XDA Forums.
Enjoy!
[9213AJ][YT9213AJ][V4A][VIPER4ANDROID][ViperFX][ROOT][TWRP][8227L]
Click to expand...
Click to collapse
[/QUOTE]
Will not work with your unit. Sorry

How did you?
I have a dump of my radio..I would like to insert twrp and viper..How did you insert that to your firmware?

codecxbox said:
I have a dump of my radio..I would like to insert twrp and viper..How did you insert that to your firmware?
Click to expand...
Click to collapse
You don't "insert" modifications per se or at least this isn't how I did it. I modified everything first and only then performed the memory dump.

Hello,
XYAuto just released a new build for 9213A!
Here is the download link:
http://file.xygala.com/?dl=11e9beab97f54d9ad64f8be5f2fd7c8a
Does anyone know whats the difference between 9213A and 9213AJ?
Here is the latest version for 9213AJ BTW:
http://file.xygala.com/?dl=01c3d91a126931efc3b6765179a8af08

kamikazedc said:
Hello,
XYAuto just released a new build for 9213A!
Here is the download link:
http://file.xygala.com/?dl=11e9beab97f54d9ad64f8be5f2fd7c8a
Does anyone know whats the difference between 9213A and 9213AJ?
Here is the latest version for 9213AJ BTW:
http://file.xygala.com/?dl=01c3d91a126931efc3b6765179a8af08
Click to expand...
Click to collapse
The download link is asking me to login.
How do I get to register?

amritpal2489 said:
The download link is asking me to login.
How do I get to register?
Click to expand...
Click to collapse
Here you get the login Data:
http://file.xygala.com
log: xyauto
pass: 123456

maniac2002 said:
Here you get the login Data:
http://file.xygala.com
log: xyauto
pass: 123456
Click to expand...
Click to collapse
Thanks a lot.. You are a saviour...
Can you also point me to a YT9216CJ latest FW as I am not able to go through the links

[ROM] [ROOT] MTK 8227L 2GB/32GB BONROAD BMW E60/E65/E90/E92 8.8" Touch Screen head unit iDrive integration (Magisk root now working!)

Hi everyone,
Created an account just so I could post this as I hadn't seen the firmware for this specific 8227L setup anywhere else. This ROM was sent to me by the seller of the unit directly, obviously no guarantees it will work on any other unit.
Anyway, it's for an 8227L_demo with 2GB ram, 32GB ROM, 8.8" touch screen, 1280x480 resolution. It is setup to be integrated with the BMW iDrive system, allowing you to switch back and forth between the original iDrive and the Android unit - the ROM is supposedly Android 10, but I believe it's really 8.1 as usual. Factory settings menu password is 8888.
It's worth noting that the ROM has no radio app baked in as this particular 8227L has no radio tuner (at least as far as I know) as it retains and uses the OEM BMW radio tuner instead. The ROM does have the ID6 EVO BMW launcher integrated which someone might be able to extract for use on other units.
I haven't attempted to root the ROM as yet, but will follow up with results when I do.
Hope this helps someone out, or some nice development for this unit can come from it.
Enjoy!
mega.nz link to ROM
UI Screenshot:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

An update on rooting.
I was successfully able to root it using the ADB method for 8227L, and had root access for approximately 10 minutes. After that, the headunit rebooted by itself and displayed a black screen with a multicoloured circle and chinese writing (download mode maybe?). The headunit then rebooted to a fresh installation of the firmware, wiping all user data.
I attempted to root it a few more times again via the ADB method, however when I reach the step 'adb remount', the headunit immediately reboots, yet again to a fresh installation wiping all user data. Unsure of what's going on, perhaps some kind of inbuilt protection in the firmware? Anyway, now it seems I cannot root via this method.
Next attempt at root would be to bake it into the ROM, does anyone have this expertise?

I was successfully able to root this unit using magisk to patch the boot.img.
I then extracted the firmware (as above) to the thumbdrive, making sure that the parent folder is named CKXUPG. I then replaced the boot.img in that folder with the patched one, and performed the system update.
Patched boot.img attached. I am able to grant superuser permissions to apps etc. There still appears to be some kind of file system protection however, as when I attempted to replace the bootanimation.zip in the root/system/media folder, I was again presented with the black screen, multicoloured circle and chinese writing and of course wiped user data. Thankfully because magisk was already baked into the boot.img, I didn't need to re-root the device.
Maybe someone can figure out what that file system protection is and how we can disable it? Otherwise advice on unpacking these system.img and repacking them would be appreciated.

biznatcher said:
Hi everyone,
Created an account just so I could post this as I hadn't seen the firmware for this specific 8227L setup anywhere else. This ROM was sent to me by the seller of the unit directly, obviously no guarantees it will work on any other unit.
Anyway, it's for an 8227L_demo with 2GB ram, 32GB ROM, 8.8" touch screen, 1280x480 resolution. It is setup to be integrated with the BMW iDrive system, allowing you to switch back and forth between the original iDrive and the Android unit - the ROM is supposedly Android 10, but I believe it's really 8.1 as usual. Factory settings menu password is 8888.
It's worth noting that the ROM has no radio app baked in as this particular 8227L has no radio tuner (at least as far as I know) as it retains and uses the OEM BMW radio tuner instead. The ROM does have the ID6 EVO BMW launcher integrated which someone might be able to extract for use on other units.
I haven't attempted to root the ROM as yet, but will follow up with results when I do.
Hope this helps someone out, or some nice development for this unit can come from it.
Enjoy!
mega.nz link to ROM
UI Screenshot:
View attachment 5194423
Click to expand...
Click to collapse
I have the same screen and no access to the advanced settings menu. As hard a time that I had dealing with no space for the harness, I would expect the ability to change things to my liking!!! I am ready to put the original back in and call it a day.

Hy , can anyone help me with something please . So i have this android headuniton my bmw 8227 2/32GB 10.25 inch and i installed "car launcher free" from google play . And now when i start the car and also the headunit, it does not boot ... it's stuck at the bmw logo so i can't do anything . Can't go to settings to restore it to factory settings . I tried to push the reset buton with a needle but all it does is to restart the headunit. Some one told me to speak to the manufacturer to send me a soft upgrade but i don't know where is the headunit from (i have bought the car with the headunit allready installed). How can i install this firmware on it ? maybe i can acces something and reset it to factory settings if the firmware does't work . Thank you

I've done same thing as you. Problem is that this radio always goes to bootloop when default launcher is changed. I managed to repair mine somehow, but I used so many ways that I don't even which one worked.
Last thing before it started to work was downloading those two files: https://drive.google.com/drive/folders/1LJ-FVgn73hxqJ-x7-pSJZuJDkfEV-c-7
Formatting pendrive to FAT32 and putting those two files on it. Then I opened car plugged in key, plugged pendrive to navi USB, disconnected negative terminal from battery for few seconds and then I reconnected negative terminal. It was supposed to boot from pendrive but it didn't happen but somehow it booted right into stock launcher.....
Also my navigation was bought on aliexpress from seller AutoTop, but he blocked me when I asked for original firmware.

I believe I have the exact same unit, very difficult to find info on them so thanks for this!
Mind if I ask a couple of questions?
1. Does the USB connection work for you when connecting to an Android phone? I can't get mine to connect at all
2. Can you tell me how you made the ROM dump? I think yours is newer than mine and I'd like to flash it but would like to create a backup of mine first, just in case.
3. Can you share a screenshot of the settings screen from the launcher? Mine is below. Just want to compare

I have exactly the same system as you do. The file I attached was some random AC8227L software just to boot this system up somehow to recovery. I did not connect it with phone I just pluged in pendrive

innye95 said:
I have exactly the same system as you do. The file I attached was some random AC8227L software just to boot this system up somehow to recovery. I did not connect it with phone I just pluged in pendrive
Click to expand...
Click to collapse
Hello,
I have the same problem, after BMW logo stays in a black screen showing LINK SYS 1, NO SIGNAL.
Can you share the files you have used please?

is there a rom for this device available to update from Android 9 to 10? the details of my device are attached. many thanks in advance

Did u get any info?

kynet said:
Hy , can anyone help me with something please . So i have this android headuniton my bmw 8227 2/32GB 10.25 inch and i installed "car launcher free" from google play . And now when i start the car and also the headunit, it does not boot ... it's stuck at the bmw logo so i can't do anything . Can't go to settings to restore it to factory settings . I tried to push the reset buton with a needle but all it does is to restart the headunit. Some one told me to speak to the manufacturer to send me a soft upgrade but i don't know where is the headunit from (i have bought the car with the headunit allready installed). How can i install this firmware on it ? maybe i can acces something and reset it to factory settings if the firmware does't work . Thank you
Click to expand...
Click to collapse
Hello, I have same problem, I have a screen from the seller AUTOTOP and now is stuck it doesn't boot. Please could you explain me how you solved it? the link of a file you had uploaded is not working.

innye95 said:
I've done same thing as you. Problem is that this radio always goes to bootloop when default launcher is changed. I managed to repair mine somehow, but I used so many ways that I don't even which one worked.
Last thing before it started to work was downloading those two files: https://drive.google.com/drive/folders/1LJ-FVgn73hxqJ-x7-pSJZuJDkfEV-c-7
Formatting pendrive to FAT32 and putting those two files on it. Then I opened car plugged in key, plugged pendrive to navi USB, disconnected negative terminal from battery for few seconds and then I reconnected negative terminal. It was supposed to boot from pendrive but it didn't happen but somehow it booted right into stock launcher.....
Also my navigation was bought on aliexpress from seller AutoTop, but he blocked me when I asked for original firmware.
Click to expand...
Click to collapse
Hello man, I have also bought a screen from AUTOTOP for my bmw e90. and since a week ago is stuck at the bmw logo. How can I proceed? Seller instructed me to send it back for repairing...

how install that rom?

marchnz said:
With screwdriver
Click to expand...
Click to collapse
yea nice,i really wait some help....whatever...

Hello there, I like this unit but I have one question.
Can this unit control all features from ccc system like parking heat and other things without the original bmw professionell radio but with idrive knob?
My unit is broken and I have to try a simple 1din radio as amplifier and a 1din cup holder. Have everyone test it without the bmw radio.

Has anyone solved the car launcher problem?

kynet said:
Hy, może mi ktoś pomóc z czymś proszę. Więc mam ten android headuniton moje bmw 8227 2 /32GB 10.25 cala i zainstalowałem "wyrzutnię samochodów za darmo" z Google Play . A teraz, gdy uruchamiam samochód, a także jednostkę główną, nie uruchamia się ... utknął w logo bmw, więc nie mogę nic zrobić. Nie można przejść do ustawień, aby przywrócić ustawienia fabryczne . Próbowałem wcisnąć buton resetu za pomocą igły, ale wszystko, co robi, to ponowne uruchomienie jednostki głównej. Ktoś powiedział mi, żebym porozmawiał z producentem, aby Zeby •wgrać soft umieść plik na pendrive w folderze update.zip podłącz pend podłącz po podłącz podłącz w nas podłącz podłącz podłącz podłącz podłącz w podłącz podłącz
Click to expand...
Click to collapse

ZEBY •WGRAĆ SOFT UMIEŚĆ PLIK NA PENDRIWA W FOLDER HUTUpdate. Zamek błyskawiczny• włóż w USB1 i Włącz radio

Hello everyone
I have a problem with my radio. can someone tell me what i have to do to solve this problem?

[GUIDE] Android 8 API27 SUPERMOD for YT9216BF YT9216CFJ YT9216BJ YT9216BFJ YT9216CJ - root, Viper4Android, TWRP, Custom UI, brick recovery and more

Hi all,
If you want to greatly improve the way your head unit works, sounds and looks like - you've come to the right place!
Why install this?
With this package you will greatly improve:
Stability
Speed
User Interface
Sound tweaking options
Customisation options
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
ON PHYSICAL BUTTONS: this software has only been tested on head units with no physical buttons (like volume) | Before making any changes, access the CAR SETTINGS -> FACTORY SETTINGS -> ENCODER SETTINGS on your head unit and take a screenshot of the current settings (see example below). After installing the package, go back to these settings and adjust them if needed. If that doesn't help and if you can't successfully re-calibrate the buttons after installing the firmware, restore your backup
Disclaimer
I do not create the software itself but rather use research and put together different mods and hacks into one package that includes very user-friendly step-by-step instructions on how to install it all. You will find the links to original posts in the instructions pdf's if credit is due. The software might include smaller changes made by me and has been fully tested in real units.
This firmware works on the following 1Gb RAM and 2 Gb RAM units with fake Android 8.1, 9.0, 9.1, 10 and Android 11 installed, with screen resolution of 1024x600 px. It will not work on Tesla-style units:
- YT9216BF | YT9216CFJ | YT9216BJ | YT9216BFJ | YT9216CJ
!! TAKE A PICTURE OF YOUR SYSTEM INFO AND KERNEL VERSION BEFORE DOING ANYTHING TO YOUR HEAD UNIT !!​
The zip file package contains:
Modified firmware - courtesy of Stranger21UFA @ 4PDA (link to the original post)
TWRP (separate folders for 1GB and 2GB RAM units)
Root via Magisk
Viper4Android
Car Launcher
Boot Animation
SEPARATE INSTRUCTIONS ARE INCLUDED IN EVERY FOLDER
​>>>> ALWAYS BACKUP YOUR UNIT BEFORE MAKING ANY CHANGES TO IT <<<<​​!! IMPORTANT !!​This is a fairly advanced installation process and will require you to follow the individual guides included in the software package - to the letter. Failing to do so, will (in "best" case) result in a slow and buggy head unit and in the worse case - brick it altogether.​
DOWNLOAD
YT9216BF * YT9216CFJ * YT9216BJ * YT9216BFJ * YT9216CJ - supermod software package & drivers
STEP-BY-STEP GUIDE (upgrading from working stock firmware):
DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER. STEPS 5 AND 6 ARE MOST CRITICAL.
Proceed to download the software package for your unit and the drivers package in the same folder
It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide
Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers.
Backup your current system by exporting a full memory dump. Video Guide
Import back your memory dump from step-5 to ensure it fully works. This is how.
Install the package. Separate instructions are included in every folder of the downloaded zip file. Follow them by the order.
IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE YOUR BACKUP AVAILABLE, follow the steps below:
DO NOT SKIP ANY STEPS, AND INSTALL EVERYTHING IN THE CORRECT ORDER.
It's highly recommended to do these upgrades with your unit connected on your desktop, rather than in the car. Video Guide
Install the Mediatek & ADB drivers on your Windows computer. Video Guide - use the same principle for ADB drivers - (download link is in the video description)
Watch this video on Test Point recovery
Import back your memory dump. This is how.
If successful - try to install the software package again or stay with your original one
IF THIS SOFTWARE PACKAGE HAS BRICKED YOUR HEAD UNIT AND YOU HAVE NO BACKUP AVAILABLE, follow the steps below:
Share the pictures of your System Info and Kernel in this thread and we'll try to help you
------------------------------------------
This post is being frequently updated and you'll find more guides and mods in our signature​------------------------------------------
** IF YOU ARE UNABLE TO RESTORE YOUR UNIT, PLEASE CONSIDER DONATING IT TO US @ ExtremeMOD, SO WE CAN BUILD MORE MODS AND TUTORIALS​
Thanks! And if this post is helpful to you please don't forget to "like" it.
Enjoy!​
[V4A][VIPER4ANDROID][ViperFX][ROOT][TWRP][8227L][YT9216BF] [YT9216CFJ] [YT9216BJ] [YT9216BFJ] [YT9216CJ]

I flashed this on my YT9216BJ and everything flashed 100%, but when I went to reboot I got nothing. It looks like the unit isn't turning on at all. There is a blue LED on the board that is lit up when I connect power. Any ideas as to what went wrong?

dustindavidson900 said:
I flashed this on my YT9216BJ and everything flashed 100%, but when I went to reboot I got nothing. It looks like the unit isn't turning on at all. There is a blue LED on the board that is lit up when I connect power. Any ideas as to what went wrong?
Click to expand...
Click to collapse
Sorry to hear that. Please try the following steps:
1. Completely disconnect your head unit from power, start Flash Tool as Administrator and execute the command: Format+ALL including deleting the bootloader
2. Run the steps from "Brick Recovery" starting with Step-6.
If the above doesn't work - revert back to your original firmware by restoring your backup. Share your System Info screen found in Car Settings as well as your build.prop file and we'll have a look.
Make sure the USB cable is properly attached. The firmware update should not take more than 20 min. If it does, it indicates a bad cable/connection.

My PC will not detect the head unit at all. I'll try the test point recovery tomorrow and report back.

dustindavidson900 said:
My PC will not detect the head unit at all. I'll try the test point recovery tomorrow and report back.
Click to expand...
Click to collapse
In that case, follow the full brick recovery guide in the OP but use your backup to restore it. Once completed, share the info mentioned in my previous reply.
PS try step 1 in my previous reply. Because the unit is only detected once you push "Download" in Flashtool and then connect the USB cable to your computer. Before that nothing will be shown in your Device Manager. If nothing happens in Flashtool then do test point method.

dustindavidson900 said:
My PC will not detect the head unit at all. I'll try the test point recovery tomorrow and report back.
Click to expand...
Click to collapse
you need test point method now to make that alive again , after shorting them for some 2,3 times,run flash tool ,select scatter and press download, then connect headhunt with a usb a cable...

Why would I need to short them for 3 minutes? Isn't shorting them while I connect the usb enough. That's what the test point instructions say.
Edit: I was able to recover using the Android 6 version of the mod. Could not get the Android 8 mod to work. Thank you for the guide

dustindavidson900 said:
Why would I need to short them for 3 minutes? Isn't shorting them while I connect the usb enough. That's what the test point instructions say.
Edit: I was able to recover using the Android 6 version of the mod. Could not get the Android 8 mod to work. Thank you for the guide
Click to expand...
Click to collapse
Glad to hear it! Android 6 is the recommended option, hands down. I made Android 8 for those that can't successfully rollback to 6.
The unit you see in the pictures in the Android 6 post is a project of mine where rollback caused physical buttons to no longer work and I couldn't remap them either. So had to put together Android 8 package.

vijay_joon said:
you need test point method now to make that alive again , after shorting them for some 2,3 minutes,run flash tool ,select scatter and press download, then connect headhunt with a usb a cable...
Click to expand...
Click to collapse
Please avoid flooding this thread with bad or misleading instructions. Thank you

Hi, can I update my yt9216bj without disconnect it from my car?

matteo2 said:
Hi, can I update my yt9216bj without disconnect it from my car?
Click to expand...
Click to collapse
You absolutely can. However you need to disconnect it from car battery.

dustindavidson900 said:
Why would I need to short them for 3 minutes? Isn't shorting them while I connect the usb enough. That's what the test point instructions say.
Edit: I was able to recover using the Android 6 version of the mod. Could not get the Android 8 mod to work. Thank you for the guide
Click to expand...
Click to collapse
i meant to say 2,3 times , my mistake , i amended, shorting them removes the previous preloader stuff , i may be noob here but this is what worked for me

The method I had to use slightly differs from everything I have read.
1.) I wired a toggle switch to my positive lead. Left it in the off position (no power to head unit)
2.) I connected my radio to my PC (most instructions said do this after)
3.) Pressed the download button in flash_tool.
4.) Shorted the test points and turned on the toggle switch. As soon as I flipped the switch the radio connected and flashed %100.
I actually soldered a button to the test points to make it easier and in case I have to do it again. Took me a minute but then I realized it's just the volume up button and the procedure is essentially the same as putting a phone into download mode.

dustindavidson900 said:
The method I had to use slightly differs from everything I have read.
1.) I wired a toggle switch to my positive lead. Left it in the off position (no power to head unit)
2.) I connected my radio to my PC (most instructions said do this after)
3.) Pressed the download button in flash_tool.
4.) Shorted the test points and turned on the toggle switch. As soon as I flipped the switch the radio connected and flashed %100.
I actually soldered a button to the test points to make it easier and in case I have to do it again. Took me a minute but then I realized it's just the volume up button and the procedure is essentially the same as putting a phone into download mode.
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Soldering a button switch is indeed by far the best approach. However since the majority of folks here are very new to these types of units, the guide makers here aim to keep it as simple as possible.
You're correct about the buttons and their functionality but since the majority of these devices come without physical buttons, you need to force download mode this way.
Finally, test point method is only required if you mess up your preloader. This should rarely happen. The only times you need to write a new preloader is when changing Android API, i.e upgrading or downgrading. And of course if you modify some of the hardware inside.
The majority of times users accidentally delete the preloader from their units in FlashTool.

I thing i found the picture for the test points but i am a little confuses 2 and three are on the same pad but 1 and 4 are different. Do i short them all together?

ian1mm989 said:
I thing i found the picture for the test points but i am a little confuses 2 and three are on the same pad but 1 and 4 are different. Do i short them all together?
View attachment 5389427
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Also my board looks a little different.

ian1mm989 said:
Also my board looks a little different.
View attachment 5389429
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Click to collapse
Please read the instructions carefully. The link is in the main post.

I have problem with my Unit (Ebilaen YT9216BF 2GB/32GB).
I installed your firmware, and try reboot to twrp (using command: reboot recovery).
After that my unit doesn't boot (black screen).
After that i want to install TWRP (by SPFlashTools as says Tutorial), but Unit was bricked.
My problem is i didn't make backup firmware.
Right now when i try to unbrick my Unit (using a lot of firmware versions) in SP Flash Tools has error: s_ft_enable_dram_fail (4032) (olso when using TestPoint in motherboard).
I think this error means that i have wrong preloader.bin
Any chance to unbrick Unit without having original firmware?
Information about Unit from motherboard:
B9216BF v0.5/C 32G
A005-B9216BF011(9.0)
20210220
Problem solved. I find correcr preloader.bin

ian1mm989 said:
Also my board looks a little different.
View attachment 5389429
Click to expand...
Click to collapse
Doesn't look that different to me. Here are your 2 test points.

dustindavidson900 said:
The method I had to use slightly differs from everything I have read.
1.) I wired a toggle switch to my positive lead. Left it in the off position (no power to head unit)
Click to expand...
Click to collapse
You could share a picture of your soldered button. Some folks here might find it helpful
I'm thinking of making a guide going for a permanent mod, where the soldered tactile SMD button will be accessible through a small hole in the back of the head unit (similar to how you access the RESET button). That way you can use a 'needle' to short the test points, rather than picking the unit apart every time.