Database Users

[HELP!] Halfbricked my Kindle Fire HD 7. Can only access TWRP.

Hello,
Yesterday i tried to load a Cyanogenmod custom Rom on my Kindle Fire HD (7") and followed an instruction to do so. I rooted the Device via ADB and FlashFire11. The KindleFireFirstAide tool was part of the tutorial but i didn't really understand how to use it. However, in FireFlash11 i installed a file called kfhd7-freedom-boot-7.4.3.img as the main Boot section and a file called kfhd7-twrp-2.4.4.0-recovery.img as recovery section. Before that i put a file with the custom ROM (cm-10.2-20131115-UNOFFICIAL-tate) on the sdcard.
Everything worked fine (after some troubleshooting) and finally i booted with that blue "Kindle Fire"-symbol. In the TWRP (v2.4.4.0) menu i installed the custom ROM. everything worked fine. Android loaded safely.
My mistake was that i wanted to install a new version of the cyanogenmod (cm-11-20131126-UNOFFICIAL-tate.zip). I wiped all the userdata and tried to insall it via TWRP. But this time it said "Fail".
Now i have no ROM installed. The Device will only boot into TWRP.
The only ROM i have saved to the SDcard is the failing ROM. Under the point "reboot" in the TWRP menu i can choose "Bootloader" wich works.
I desperately tried figuring out how to get the files from a working ROM on the device to install it via TWRP, but i cant access the device via ABD. But one thing does work: If i set the device to "Bootloader"-Mode, i can access it via KFFirstAide. With option 10 of the KFFA i can reboot the Kindle in normal mode. This proofs to me, that i can access the Device in a way. Isn't it possible to send the working ROM Data to the Device via Fastboot?
Sorry for my limited knowledge in this area. And sorry for my bad English, i'm from germany
Would be so nice if anyone could help me. If you need more information on my case i will post it immediately.
For clarification:
I need to know how i can load a custom ROM on the Device to Flash the Device Succesfully. Unfortunately the Device doesn't appear in the Drive Selection of my Windows (8.1). In the Device Manager it is featured as "Kindle Fire HD 7" with a little triangle. During boot the Kindle appears for short period of time as ADB-Device.
I need access to the SDcard of the device to load the working ROM on it. But how do i get access?
EDIT2:
I found a thread about fastboot commands. There is a command as following: fastboot -i 0x1949 update <filename>. Is this a way to install a ROM using fastboot, or is there no way to install a ROM via fastboot?
SOLVED:
I found out that the device had to be accessable (ADB) while in recovery. So looked at my ADB drivers. in a thread there was posted, that TWRP 2.4.4.0 is to old for the newest ADB-driver (which i had installed). So i installed older ADB drivers. Then the device was recognized as ADB Interface. I used the command "adb push" to load the working files to the sdcard. In TWRP installed the Cyanogenmod and now everything boots and works fine
thanks

Did you have the Kindle Fire HD 7 from Year 2013?
If yes how you do this? I AM TO FROM GERMANY!! Can you answer please on german PN?

Arti96 said:
Did you have the Kindle Fire HD 7 from Year 2013?
If yes how you do this? I AM TO FROM GERMANY!! Can you answer please on german PN?
Click to expand...
Click to collapse
got no pn

Arti96 said:
Did you have the Kindle Fire HD 7 from Year 2013?
If yes how you do this? I AM TO FROM GERMANY!! Can you answer please on german PN?
Click to expand...
Click to collapse
Only root exists for the 2013 KFHD7 at this time. No custom ROM's yet.

Nexus 6P stuck in Google Logo

Hello guys! Some help would be nice... Thanks in advance.
So i enrolled to Android 7 Beta and downloaded the latest OTA update. I was fine until i saw some apps i have didnt work in Android 7. So i wanted to go back to Android 6.
I tried unrolling my device from the beta but it didnt gave me an update from the Settings menu.
Then i downloaded the factory image and flashed it with fastboot.
I flashed everything and now it is stuck at Google Logo. I tried wiping cache, wiping data and reseting the phone in different manners.
What else should i do?
Thanks in advance.

akumalol said:
Hello guys! Some help would be nice... Thanks in advance.
So i enrolled to Android 7 Beta and downloaded the latest OTA update. I was fine until i saw some apps i have didnt work in Android 7. So i wanted to go back to Android 6.
I tried unrolling my device from the beta but it didnt gave me an update from the Settings menu.
Then i downloaded the factory image and flashed it with fastboot.
I flashed everything and now it is stuck at Google Logo. I tried wiping cache, wiping data and reseting the phone in different manners.
What else should i do?
Thanks in advance.
Click to expand...
Click to collapse
Re-flash MM stock package again via fastboot. Among the .img files flash bootloader and radio first but make sure you do "fastboot reboot-bootloader" after flashing each of the two.

blitzkriegger said:
Re-flash MM stock package again via fastboot. Among the .img files flash bootloader and radio first but make sure you do "fastboot reboot-bootloader" after flashing each of the two.
Click to expand...
Click to collapse
Downloaded the first factory image for Nexus 6p and did flash everything and followed your suggestion exactly. 10 Minutes still Google Logo.
:/

akumalol said:
Downloaded the first factory image for Nexus 6p and did flash everything and followed your suggestion exactly. 10 Minutes still Google Logo.
:/
Click to expand...
Click to collapse
FYI. I managed to finally boot again on Android 7 using the OTA update from here. https://www.reddit.com/r/Nexus6P/comments/4z4ru1/android_n_ota_link_for_nexus_6p_from_601_to_70/
The problem is i cant get back to MM and i guess i have to wait somehow for the updated apps to work with Nougat.

My computer isn't even detecting my phone within ADB... any help?

Licensedbeast said:
My computer isn't even detecting my phone within ADB... any help?
Click to expand...
Click to collapse
When you select "Apply updated from ADB" i had to unplug and re plug my phone to my computer in order to see it. If windows says it is unrecognized i guess you need some drivers.

I officially hate Android 7. Boot loops galore. Factory reset without restoring ANYTHING is the only way to keep it from looping right now.... But its only been an hour so we'll see. Like you I'm unable to rollback to MM. My computer also is working with adb. I've updated my sdk to the newest version too. I can get the device serial number in fastboot, but the reboot commands give me error device not found.

akumalol said:
When you select "Apply updated from ADB" i had to unplug and re plug my phone to my computer in order to see it. If windows says it is unrecognized i guess you need some drivers.
Click to expand...
Click to collapse
Damn... I tried Factory Resetting... and all I had to do was unplug and re plug. Thanks that worked

I have been on the beta program just to get Nougat and downloaded and installed it just fine a week ago. Now all of a sudden today my phone goes off and then to the never ending Google logo. I turned it back off, and now it wont come on, wont charge, etc. Nothing. How can I get it back live again. Even when I had the Google logo earlier I couldnt boot to anything else. Holding power and volume down does nothing.

Hello everyone! I bring news from the TWRP developers from the #TWRP IRC channel! TWRP 3.0.2-1 has a fatal bug! If you backup and restore EFS it will brick you! Do not backup and restore EFS on 3.0.2-1! Use 3.0.2-0 instead! This has already been fixed in the newer builds!
If you have been bricked you NEED to Erase the EFS partitions and that will fix it immediately.
For the Nexus 6P go to TWRP. Then on PC Open Command Prompt with access to ADB ( Android Debug Bridge) and execute the following commands:
ADB shell dd if=/dev/zero of=/dev/block/platform/soc.0/f9824900.sdhci/by-name/modemst1 bs=16384
and
ADB Shell dd if=/dev/zero of=/dev/block/platform/soc.0/f9824900.sdhci/by-name/modemst2 bs=16384
This should fix it for ANY Nexus 6P users. Users on other phones with the same problem await instructions!

bogomil4e said:
Hello everyone! I bring news from the TWRP developers from the #TWRP IRC channel! TWRP 3.0.2-1 has a fatal bug! If you backup and restore EFS it will brick you! Do not backup and restore EFS on 3.0.2-1! Use 3.0.2-0 instead! This has already been fixed in the newer builds!
If you have been bricked you NEED to Erase the EFS partitions and that will fix it immediately.
For the Nexus 6P go to TWRP. Then on PC Open Command Prompt with access to ADB ( Android Debug Bridge) and execute the following commands:
ADB shell dd if=/dev/zero of=/dev/block/platform/soc.0/f9824900.sdhci/by-name/modemst1 bs=16384
and
ADB Shell dd if=/dev/zero of=/dev/block/platform/soc.0/f9824900.sdhci/by-name/modemst2 bs=16384
This should fix it for ANY Nexus 6P users. Users on other phones with the same problem await instructions!
Click to expand...
Click to collapse
Was running the Nougat 7.0 WETA ROM, and had some issues with sound performance, plus battery life was tanking, so went to using Vanir 6.0.
Wiped and installed (I assume from the process that backup and restore is part of this process), then pico gapps, and stuck on boot screen.
Found this thread and followed instructions. The first ABD command works flawlessly, but the second one returns the standard printscreen when a command isn't recognized, and lists all the adb options. Possibility it's entered incorrectly?
Boot issue persists

hifiaudio2 said:
I have been on the beta program just to get Nougat and downloaded and installed it just fine a week ago. Now all of a sudden today my phone goes off and then to the never ending Google logo. I turned it back off, and now it wont come on, wont charge, etc. Nothing. How can I get it back live again. Even when I had the Google logo earlier I couldnt boot to anything else. Holding power and volume down does nothing.
Click to expand...
Click to collapse
Have you found a solution? Mine is doing the exact same thing

Device is corrupt, stuck on google logo
It's been a while since my crack flashing days but i just got my N6P, updated to MTC20F, Unlocked Bootloader, installed TWRP 3.0.2-2, rooted, Tried to install CM13, I got the wrong gapps tho, forgot to check ARM64 instead of ARM. so i got a bad install with the gapps, said it wasn't compatible. So I tried to wipe and restore my backup i made in TWRP, but i keep getting the "device is corrupt and cannot be trusted" then stuck at Google logo. I would think if i could push the factory img or the correct Gapps to the phone, I could flash with no problem. How do i get new files onto the phone while in TWRP? Sorry if it's a noob question, but i need help. Thanks!

wonton9224 said:
It's been a while since my crack flashing days but i just got my N6P, updated to MTC20F, Unlocked Bootloader, installed TWRP 3.0.2-2, rooted, Tried to install CM13, I got the wrong gapps tho, forgot to check ARM64 instead of ARM. so i got a bad install with the gapps, said it wasn't compatible. So I tried to wipe and restore my backup i made in TWRP, but i keep getting the "device is corrupt and cannot be trusted" then stuck at Google logo. I would think if i could push the factory img or the correct Gapps to the phone, I could flash with no problem. How do i get new files onto the phone while in TWRP? Sorry if it's a noob question, but i need help. Thanks!
Click to expand...
Click to collapse
You can push the file via adb or just connect your phone through usb cable while in twrp and drag and drop from pc to your phones storage drive

Yeah I couldn't get the internal storage to mount on xp but it does on win 7, window pops right up after drivers install. I tried flashing cm13 with the correct gapps but it still hangs at Google. I'm using the skipsoft toolkit to try and flash back to stock right now

Hope everyone here can help me.
I was flashing a 7.0 ROM on my phone with the NRDU90 vendor. The flashing failed so I restored from my backup made by TWRP. The restore was successful, but now I'm stuck in a bootloop. The phone goes to the Google splash screen with the lock(it is in the unlocked position) and then goes right back to the screen that mentions about device corruption and please relock the bootloader.
When it wasn't booting, I was able to boot into fastboot and then into recovery with no issues. I tried the fastboot flash of NRDU90 and also MCT20L builds direct from google. All flash but continues to loop. Only success that saw a small part of the Android splash boot was flashing Tupac's 7.0 rom but that never got any further.
Hoping y'all can help. I personally do not have a spare phone so this is my only device. Willing to try any steps and if need to, can do like a hangout session for any help.

Flash kernel for mm and then rom

pctechdroid said:
Hope everyone here can help me.
I was flashing a 7.0 ROM on my phone with the NRDU90 vendor. The flashing failed so I restored from my backup made by TWRP. The restore was successful, but now I'm stuck in a bootloop. The phone goes to the Google splash screen with the lock(it is in the unlocked position) and then goes right back to the screen that mentions about device corruption and please relock the bootloader.
When it wasn't booting, I was able to boot into fastboot and then into recovery with no issues. I tried the fastboot flash of NRDU90 and also MCT20L builds direct from google. All flash but continues to loop. Only success that saw a small part of the Android splash boot was flashing Tupac's 7.0 rom but that never got any further.
Hoping y'all can help. I personally do not have a spare phone so this is my only device. Willing to try any steps and if need to, can do like a hangout session for any help.
Click to expand...
Click to collapse
Read post #10.
Sent from my Nexus 5X using Tapatalk

Two weeks ago I updated my nexus 6p to the latest may security patch update of 7.1.2, I was out of station for a week I left my phone switch off at home when I came back home and tried to start the phone it got stuck on the Google logo I tried to clear cache but it too didn't work out for me what should I do to bring my phone back to normal, my phone is not under warranty it has expired almost 5 months ago, plz plz help worried about it

[email protected] said:
Two weeks ago I updated my nexus 6p to the latest may security patch update of 7.1.2, I was out of station for a week I left my phone switch off at home when I came back home and tried to start the phone it got stuck on the Google logo I tried to clear cache but it too didn't work out for me what should I do to bring my phone back to normal, my phone is not under warranty it has expired almost 5 months ago, plz plz help worried about it
Click to expand...
Click to collapse
try flashing the newest 7.1.2 vendor i was having the same issue when i tried going back to 7.1.2 from android O

Help please can't see my phone in adb

I've had my Essential two weeks i was on 8.1 beta.Today i unlocked the boot loader.Then installed twrp while in twrp i side loaded magisk.I went back to fastboot then hit start .The phone just went into a bootloop.I Was able to go back to twrp 2 times but now i can't get back to any type of recovery.I Can get back to fastboot mode ishow all the info and secure boot says yes and device state unlocked.My pc see essential phone fastboot in the device manager but i can't get adb to see it .Can anyone help me ?

forgot something
looks like i skipped this part . Once you're in TWRP, install the stock boot image and then the Magisk/SuperSU zip.Is there anything i can do?

videodave1 said:
I've had my Essential two weeks i was on 8.1 beta.Today i unlocked the boot loader.Then installed twrp while in twrp i side loaded magisk.I went back to fastboot then hit start .The phone just went into a bootloop.I Was able to go back to twrp 2 times but now i can't get back to any type of recovery.I Can get back to fastboot mode ishow all the info and secure boot says yes and device state unlocked.My pc see essential phone fastboot in the device manager but i can't get adb to see it .Can anyone help me ?
Click to expand...
Click to collapse
adb only works while phone is booted into system so nothing wrong there. If you're in the bootloader menu where you see that the status of your device is unlocked then you're already in fastboot mode. Just flash twrp again and the sideload stock 8.1 beta boot image (you can probably find it on xda), sideload magisk too. Go into install and press flash image file and find the stock boot image and then go into install again and change to flash .zip and flash magisk. After that, reboot into system.

WOW thank you so much'
Arju said:
adb only works while phone is booted into system so nothing wrong there. If you're in the bootloader menu where you see that the status of your device is unlocked then you're already in fastboot mode. Just flash twrp again and the sideload stock 8.1 beta boot image (you can probably find it on xda), sideload magisk too. Go into install and press flash image file and find the stock boot image and then go into install again and change to flash .zip and flash magisk. After that, reboot into system.
Click to expand...
Click to collapse
I was able to flash twrp i'll try the rest when i get home from work

sideloading stock img
videodave1 said:
I was able to flash twrp i'll try the rest when i get home from work
Click to expand...
Click to collapse
Do i need it to be zipped I've tried it as image that i downloaded from xda and I've tried a zip i got from Essential neither are working?

zip file
videodave1 said:
Do i need it to be zipped I've tried it as image that i downloaded from xda and I've tried a zip i got from Essential neither are working?
Click to expand...
Click to collapse
When i try i get invalid file format. This is using a zip i got from Essential.

Stuck twrp says no os installed . But i did learn how to push files.

just trying to get back to stock now 

videodave1 said:
just trying to get back to stock now 
Click to expand...
Click to collapse
https://forum.xda-developers.com/essential-phone/development/stock-7-1-1-nmj20d-t3701681

thanks been there tried the Oreo beta that is what i was on when i started and tried the 1st build before the betas i get an error on both i'll try to download them on another pc my phone does show up when i type fastboot devices now just need an os now .

Okay got back to 8.1 bootloader still unlocked twrp not install and i don't have root.I may just wait until P comes out.I'll try and learn more about adb. Thanks for your help Arju.

thanks everyone.

videodave1 said:
Okay got back to 8.1 bootloader still unlocked twrp not install and i don't have root.I may just wait until P comes out.I'll try and learn more about adb. Thanks for your help Arju.
Click to expand...
Click to collapse
No problem. Thank you very much for the donation, that was really kind of you. Hey I'm sure you'll get the hang of it before android P drops. you did figure out what went wrong all by yourself so get a hold of the right boot.img and the rest is exactly as how you did it in the first place but flash the boot.img before magisk. Let me know if you want to give it a dive again.

I'm on 8.1 boot loader unlocked and ready to try to root again .Thanks for the help

This is the closest thread i could find to what is happening to my PH-1.
Like videodave1 I 'was' running the latest stock 8.1 and have my bootloader unlocked. In trying to root the phone I did this:
flash boot flash boot twrp.img
adb shell twrp sideload
adb sideload magisk.zip
All installations went well, but when trying to reboot from twrp it forced me to install the app. After that the phone went into boot loop.
* Note how I didn't sideloaded the Oreo 8.1 image before magisk.
By pressing all 3 buttons I can get the phone to reboot and releasing the volume up I can get to Fastboot. Just volume down and power doesn't work.
The problem now is that adb and fastboot no longer recognise the phone. adb devices just gives an empty list and fastboot only shows < waiting for device >
Trying to go into Recovery mode doesn't work either. Power off doesn't work and Restart bootloader, well, restarts the bootloader.
It might be relevant to mention that I'm running adb and fastboot from Terminal in a Mac and that this is my very first and frustrated attempt to root any phone.
For reference this is what the FastBoot Mode brings:
PRODUCT_NAME - Mata
VARIANT - OPENUS
BOOTLOADER VERSION - mata-aad8ac4
BASEBAND VERSION - 2.0.C4-M1.3.1
SECURE BOOT - yes
DEVICE STATE - unlocked
I might have to just resign myself to the ordinary land of unlocked full stock phones
Thanks very much

avocom said:
This is the closest thread i could find to what is happening to my PH-1.
Like videodave1 I 'was' running the latest stock 8.1 and have my bootloader unlocked. In trying to root the phone I did this:
flash boot flash boot twrp.img
adb shell twrp sideload
adb sideload magisk.zip
All installations went well, but when trying to reboot from twrp it forced me to install the app. After that the phone went into boot loop.
* Note how I didn't sideloaded the Oreo 8.1 image before magisk.
By pressing all 3 buttons I can get the phone to reboot and releasing the volume up I can get to Fastboot. Just volume down and power doesn't work.
The problem now is that adb and fastboot no longer recognise the phone. adb devices just gives an empty list and fastboot only shows < waiting for device >
Trying to go into Recovery mode doesn't work either. Power off doesn't work and Restart bootloader, well, restarts the bootloader.
It might be relevant to mention that I'm running adb and fastboot from Terminal in a Mac and that this is my very first and frustrated attempt to root any phone.
For reference this is what the FastBoot Mode brings:
PRODUCT_NAME - Mata
VARIANT - OPENUS
BOOTLOADER VERSION - mata-aad8ac4
BASEBAND VERSION - 2.0.C4-M1.3.1
SECURE BOOT - yes
DEVICE STATE - unlocked
I might have to just resign myself to the ordinary land of unlocked full stock phones
Thanks very much
Click to expand...
Click to collapse
Even though your phone does not show up its there wipe everything.Fallow what Arju said in his post.I got back to stock then took the 8.1 update i'm not rooted but my bootloader is still unlocked.Oh make sure you unlock critical

videodave1 said:
Fallow what Arju said in his post.
Click to expand...
Click to collapse
Thanks for coming back to me. I really appreciate it.
Arju said:
Just flash twrp again and the sideload stock 8.1 beta boot image (you can probably find it on xda), sideload magisk too.
Click to expand...
Click to collapse
I might be missing something hopefully obvious here. How can I flash twrp again if I my computer can't see the phone. With the USB phone plugged in and in the FastBoot screen I enter into Terminal:
fastboot flash boot twrp.img
and I get:
< waiting for any device >
How do I flash it from the FastBoot screen? BTW, going to Recovery mode just hangs at the Essential logo.
Thanks

avocom said:
Thanks for coming back to me. I really appreciate it.
I might be missing something hopefully obvious here. How can I flash twrp again if I my computer can't see the phone. With the USB phone plugged in and in the FastBoot screen I enter into Terminal:
fastboot flash boot twrp.img
and I get:
< waiting for any device >
How do I flash it from the FastBoot screen? BTW, going to Recovery mode just hangs at the Essential logo.
Thanks
Click to expand...
Click to collapse
are you able to get to the bootloader menu? where it says start on the top.

Arju said:
are you able to get to the bootloader menu? where it says start on the top.
Click to expand...
Click to collapse
Thanks Arju. If you are referring to the FastBoot menu where you can use the up and down volume keys to select Start, Restart Bootloader, Recovery mode and Power off Yes, but not much else unfortunately.
If I select Recovery mode I don't go to the screen with the blue buttons from twrp.
Thanks

avocom said:
Thanks Arju. If you are referring to the FastBoot menu where you can use the up and down volume keys to select Start, Restart Bootloader, Recovery mode and Power off Yes, but not much else unfortunately.
If I select Recovery mode I don't go to the screen with the blue buttons from twrp.
Thanks
Click to expand...
Click to collapse
What you need to understand is that twrp will not stick after you flash it. This device does not have a recovery partition and that's why you replace the boot partition with twrp and while you're in twrp you need to flash the boot.img back and whatever mods on top of that such as kernel etc.. If you flash a rom then it will replace the twrp with the boot.img found in the rom zip.
So now we need the computer to recognize you device. Could you unplug the cable and change the usb port on you computer. connect your phone while you're in the bootloader menu where it says start on the top.
The use use fastboot command: fastboot devices
See if the computer recognizes you device.

[RECOVERY] TWRP for Onn Android Tablets (unofficial) - 2019-11-30

TWRP Custom Recovery for the Onn Android Tablet series​
This is the first fully-featured custom recovery for Walmart's MediaTek-based Onn tablets: ONA19TB002, ONA19TB003 and ONA19TB007. TWRP needs no introduction. If you have come here, you probably have some idea of what it is and what it's used for. This TWRP build does not need the bootloader unlocked or VBMeta verification disabled, although it's recommended that you at least unlock the bootloader.
DISCLAIMER
Everything described in this thread is done at your own risk. No one else will be responsible for any data loss, corruption or damage of your device, including that which results from bugs in this software.
FEATURES
Decrypted data partition
All USB modes functional: MTP, ADB, Mass Storage, OTG, Charging
Fast boot time
Adoptable storage mounting
Firmware image backup and restore
Works under locked bootloader
Android 9 build fits within the 16MB recovery partition -- no compromises or partition resizing necessary
INSTALLATION METHOD 1
Download the recovery to your PC and unzip the image
Unlock the bootloader (skip if you have already done this)
Enable OEM Unlock in Developer Options in Android Settings
Boot into fastboot mode either by holding vol. up+power to power it on and selecting "Fastboot mode", or by running the 'adb reboot bootloader' command from within Android.
Install fastboot and appropriate drivers on your PC if you have not set those up
Unlock the bootloader with the command
Code:
fastboot flashing unlock
...and follow the instructions on the screen. This will wipe your data.
Flash the custom recovery with
Code:
fastboot flash recovery twrp-3.3.1-ONA19TB002.img
(use the right file name path for your device)
Reboot to recovery with
Code:
fastboot oem reboot-recovery
INSTALLATION METHOD 2
This assumes you are familiar with SP Flash Tool or can figure it out on your own
Download the recovery to your PC and unzip the image
Get the appropriate scatter file for your device. The scatter file may be found in the device's firmware under /system/data/misc.
Set up SPFT Download tab as Download Only. Load your scatter file.
Under the recovery line, double-click Location and open your TWRP image.
Click Download and connect your powered-off tablet to your PC. SPFT will automatically flash the recovery to the emmc and disconnect when finished.
INSTALLATION METHOD 3
Head over to Amazing Temp Root for MediaTek ARMv8, read the requirements and directions, and grab the latest mtk-su.
Open a root shell with mtk-su
Flash the (unzipped) recovery with the command:
Code:
dd bs=1048576 if=twrp-3.3.1-0-ONA19TB002.img of=/dev/block/by-name/recovery
(replace the if= file name with your appropriate recovery image path)
Exit root shell
START RECOVERY
Three methods:
On a powered off tablet, hold Vol. up+power for about 3 seconds. In the menu that appears, select "Recovery mode"
With Android ADB, use the command 'adb reboot recovery'
From Android root shell, use the command 'reboot recovery' or just use any root app with OS reboot features
NOTES
Kind of important: Make a backup of your Crypto Footer as soon as you can. This is the encryption key to your data partition. When accessed from TWRP, this key can get "upgraded" so that you will get locked out of Android. TWRP uses a hacky workaround that saves and restores the original footer on every /data decrypt. But that method is not what I would call 100% reliable.
Make sure you have a backup of the untouched stock system and vendor images. There are no official firmware packages available to download.
Only mount system/vendor partitions in read/write mode if you have unlocked the bootloader. It is recommended to choose to leave system read-only at the startup prompt unless you have a specific reason to modify it. If the bootloader is locked, then dm-verity is enforced.* So merely mounting it once in r/w will cause a boot loop.
It's currently not possible to install incremental OTA updates using this TWRP. Use the stock recovery to update the FW. That will only work if you have never mounted system/vendor in write mode.
DOWNLOAD (Nov. 30, 2019)
Current version: 3.3.1-1
ONA19TB002 - Onn 8" model
ONA19TB003 - Onn 10.1" model
ONA19TB007 - Onn 10.1" w/keyboard model
Source code
ONA19TB002 | ONA19TB003 | ONA19TB007
ACKNOWLEDGEMENTS
The team behind TWRP & OmniROM
@tek3195 for testing and feedback on the 8" model

Please post feedback since these are still pretty new and not exhaustively tested. Let me know if I should port it to other models in the series.

Reserved also

grabbing this one too cuz why not

Very nice! I'll download and test the 003 one soon.
I also have a 007 model to experiment with.
I tried about a dozen times to build TWRP and failed miserably LOL. Closest I got was one that would boot but the rotation was all messed up, USB wouldn't work, didn't mount some partitions... Yeah, it was a hot mess.
Do you happen to have sources available?

Hi @NFSP G35,
I'll have the source code soon. Most of the tricks involved patching bootable/recovery. So I need to commit those changes and include the proper patch set from my tree....

Amazing!! Gonna install and test 8" right now.

Has anyone tried a GSI on these tablets yet?

MishaalRahman said:
Has anyone tried a GSI on these tablets yet?
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I do know @tek3195 , the Onn 8 thread starter, has tried many of them as well as others here, somewhere on that thread he listed his tests and opinion of several of them.
I'm pretty sure others on that thread have also tried GSI's.

MishaalRahman said:
Has anyone tried a GSI on these tablets yet?
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I did try both Phhuson vanilla and also Liquid Remix (I'm keeping this one for now). I didn't flash them through twrp, but using fastboot via bootloader.

WoW! AwEsOmE! I cannot wait to try this! THANK YOU!!!!!!

Hey,
This is a neat thing to see for the Onn tablets. I have a question though. I own a device based on the mt8163, and am trying to help people with another device I don't own (the powkiddy x18 which also uses the mt8163). One of the things I wanted to do was to make a custom rom for the x18, since it's stock firmware is horrible. And of course, one of the first steps to custom roms is twrp. So I have a question for you that I hope you can answer for me. How did you make this build of twrp? I have seen no device trees for this device so I was kinda curious. If you can help me in any way, I'd be so grateful, and I'm sure the other people with the x18 would be grateful for help.

@diplomatic
Is there a different procedure for installing TWRP on a locked bootloader?
I can confirm that using SP Flash to load your TWRP.img will produce a bootloop when installing to a device with the BL locked. Reflashing the original recovery.img makes the problem go away. You mentioned in the OP that this TWRP will work on a locked BL so I thought I would share my case study with you in following the procedure you defined.
MY SINCERE GRATITUDE FOR YOUR EFFORTS IN PORTING THIS TO THE ONN!

You're welcome, @Spatry.... Can you describe how you ended up with a locked BL? Was it unlocked before? Have you ever tweaked vbmeta? Also, when you say bootloop, do you mean for Android or just for recovery? I'm not going to insist that it works under locked BL. I tested it once and it did boot up...

diplomatic said:
You're welcome, @Spatry.... Can you describe how you ended up with a locked BL? Was it unlocked before? Have you ever tweaked vbmeta? Also, when you say bootloop, do you mean for Android or just for recovery? I'm not going to insist that it works under locked BL. I tested it once and it did boot up...
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Presently, I am running stock with Magisk patched BOOT on locked bootloader, stock vbmeta. The boot loop was at the ONN Android screen, I could not get it to even boot into recovery.
At one time I did run with the bootloader unlocked (with --disable-verification on stock vbmeta) and I ran Phusson's AOSP, Liquid Remix and Bliss. I found there was no benefit to me in running the other mods so I reverted back to stock courtesy of @CaffeinePizza and the bootloader re-locked to get rid of that annoying 5 second orange state.
In each instance, I always used SP Flash tools to load all .img files. I only used fastboot to install magisk_patched.img onto the stock installation. Unlocking the bootloader erases all data and I did not feel like reinstalling everything again, so I figured I would try to install TWRP per your instruction to see if it would work while the BL was still locked... Restoring the original recovery got rid of the bootloop. I do want to try your TWRP so I will try it with BL unlocked when I get some free time to do so.

Spatry said:
Presently, I am running stock with Magisk patched BOOT on locked bootloader, stock vbmeta. The boot loop was at the ONN Android screen, I could not get it to even boot into recovery.
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This sounds like you might have flashed a wrong/corrupt image to recovery. It may have to do with AVB checks rather than bootloader lock. But those conditions might be interdependent somehow so I can't tell you for sure. The fact that you are able to boot a patched image on a locked BL says it doesn't care too much about verification. I can tell you for sure that any recovery image must have avb metadata, not necessarily the required hash, for both Android and recovery to boot. Can you try to unzip the image file and flash it over again?

Hmm, the situation with the bootloader lock sounds eerily similar to the Nabi SE. The latter also had a similar implementation where there's not much in the way of locking things down, other than an (easily circumvented) SP Flash Tool signature check and different preloader keys. And here's the real kicker: the nearly-identical Fisher Price Nabi also ran on the MT8163, so it makes me wonder if it's possible to boot Pie on it, or perhaps a GSI assuming that Treble can be tacked onto it.
Also, do you have the source repo to this TWRP port of yours?

If anyone here gave me an XDA ad-free subscription, thanks a lot! I didn't get a notification of who it was. Using this site is a lot more bearable now.

diplomatic said:
If anyone here gave me an XDA ad-free subscription, thanks a lot! I didn't get a notification of who it was. Using this site is a lot more bearable now.
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Where do I find crypto footer to backup

diplomatic said:
If anyone here gave me an XDA ad-free subscription, thanks a lot! I didn't get a notification of who it was. Using this site is a lot more bearable now.
Click to expand...
Click to collapse
Kinda cool without the ads isn't it. I know I sent one about a week ago or so. I think everybody ought to send you one, you deserve it. THANKS and AWESOME work.

Google Pixel 3a (sargo) brick - error boot prepare

Hi,
Today I wanted change my recovery. I had the Lineage OS recovery, but i was trying to install the twrp recovery.
So, the guide of twrp says that you should boot the twrp via fastboot boot twrp.img and install via the booted twrp. But I mistaken the command and I wrote fastboot flash boot twrp.img, I tried to reboot and the device booted himself in fastboot with the enter reason "error boot prepare" and I can't boot into the system or recovery.
I tried to flash the official image downloaded from the Google Developers website, but when i run ./flash-all.sh, console get stuck. I waited for about 15 minutes but nothing. I tried even the official Android Flash Tool but after 10 seconds it says "Your device stopped responding. You may have to select restart in the bootloader menu in order for it to be recognised again."
Does anyone know how to help me? Thanks in advance.

GioPan_ said:
Hi,
Today I wanted change my recovery. I had the Lineage OS recovery, but i was trying to install the twrp recovery.
So, the guide of twrp says that you should boot the twrp via fastboot boot twrp.img and install via the booted twrp. But I mistaken the command and I wrote fastboot flash boot twrp.img, I tried to reboot and the device booted himself in fastboot with the enter reason "error boot prepare" and I can't boot into the system or recovery.
I tried to flash the official image downloaded from the Google Developers website, but when i run ./flash-all.sh, console get stuck. I waited for about 15 minutes but nothing. I tried even the official Android Flash Tool but after 10 seconds it says "Your device stopped responding. You may have to select restart in the bootloader menu in order for it to be recognised again."
Does anyone know how to help me? Thanks in advance.
Click to expand...
Click to collapse
Do you have tryied to run the official google tool in Windows to try to rescue it?

Estebiu said:
Do you have tryied to run the official google tool in Windows to try to rescue it?
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Yes, I wrote in the post, I tried both the command line tool and the chrome version. Btw i'm on linux

Okay so, I fixed.
For anyone who will have this problem you just need to flash official Android 9 and next Android 10. Only with Android 10 you can use fastboot flash boot recovery.img (you can't use twrp in android 10 with the Pixel 3a)

GioPan_ said:
Okay so, I fixed.
For anyone who will have this problem you just need to flash official Android 9 and next Android 10. Only with Android 10 you can use fastboot flash boot recovery.img (you can't use twrp in android 10 with the Pixel 3a)
Click to expand...
Click to collapse
I'll try this...

GioPan_ said:
Okay so, I fixed.
For anyone who will have this problem you just need to flash official Android 9 and next Android 10. Only with Android 10 you can use fastboot flash boot recovery.img (you can't use twrp in android 10 with the Pixel 3a)
Click to expand...
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Does this work if adb not working? I only have fastboot.

WriteLovey said:
Does this work if adb not working? I only have fastboot.
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It depends if your pc were authorized, if it was, you can use fastboot to flash the stock version of Android 9, just running the flash-all(.bat) script.

GioPan_ said:
It depends if your pc were authorized, if it was, you can use fastboot to flash the stock version of Android 9, just running the flash-all(.bat) script.
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Click to collapse
I'm not certain I understand what you mean by PC authorized? I'm using a Windows 10 tablet. When the phone is attached to the computer it sees it as a device that can be disconnected through USB.

WriteLovey said:
I'm not certain I understand what you mean by PC authorized? I'm using a Windows 10 tablet. When the phone is attached to the computer it sees it as a device that can be disconnected through USB.
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All is well. I'm back on my Pixel, yeah!

GioPan_ said:
It depends if your pc were authorized, if it was, you can use fastboot to flash the stock version of Android 9, just running the flash-all(.bat) script.
Click to expand...
Click to collapse
I just had an encounter with this. I was rooting my device (Pixel 3A) and messed up my partitions through accidentally attempting a downgrade which broke all my ****. I was unable to easily reset this device to factory, so it took me several days to figure out and root. I'm getting better though as a hacker, because a year ago this would have taken me a month.
I was able to enter recovery mode (lying down Android, NO COMMAND). From this recovery mode, adb devices -l recognized my device, although I was unable to get a shell.
At first, ADB was telling me the device was authorized, but I messed with a bunch of other stuff (tried to flash a bunch of different partitions and monkey around in general trying to install Magisk) and then ADB started telling me it wasn't authorized when I used devices -l.
Once it said unauthorized, I was unable to issue the device any commands with ADB, so I just used hardware keys to get into recovery mode. From there, I selected OTA update, and it got into sideload mode. At that point, I used adb sideload with the OTA package that I downloaded here https://developers.google.com/android/ota
^^^ That operation did successfully restore my device to factory
This following guide here describes the details of how to use hard keys to enter recovery on this phone (don't download anything from there tho, and make sure your adblock is on)
How to Hard Reset your new Google Pixel 3a [Tutorial]
In this article, you will learn how to start your Google Pixel 3a up into the Recovery Mode and perform the Hard Reset to make it work perfectly again.
thedroidguy.com

I just wanted to say, I've been wrestling this hardbrick for a couple of days with my Pixel 3a.
I've finally overcome it by sideloading the most recent OTA update after using a hard key combo to get into recovery mode. The hard key combo is hold Power Button, tap Volume Up, then release both. Then, all you need is to use the command:
adb sideload <OTA.zip>
^^^OTA wasn't the actual filename though, you can download OTA packages for Pixel 3A here: https://developers.google.com/android/ota
the OTA binaries are NOT the same as the factory images, which is here
Factory Images for Nexus and Pixel Devices | Google Play services | Google for Developers
developers.google.com
Sideloading the OTA package brought my phone back from only having fastboot and recovery mode, even when flash-all.sh from the official downloaded firmware failed. Now I know how to undo damage that I cause by rooting this thing. Since I sideloaded newest firmware, it was also like applying an update. I easily got root after that, and I've logged the process. I'll make it into a guide soon

I'll just note that if you accidentally flashed the TWRP boot image instead of simply booting into it, I believe all you have to do is flash the stock boot.img to fix the problem. Obviously you can sideload the entire rom image, but that shouldn't be necessary.
Using the Windows computer (or whatever computer you are sending ADB commands from), download the full stock image directly from Google. Unzip it and then upzip the folder inside. You should find the boot.img file inside that folder. Take that file and then flash it to the phone using the normal ADB command: fastboot flash boot boot.img
While I haven't tried this myself recently, it should work in theory. The command "fastboot flash boot twrp.img" flashes the boot partition with a non-working twrp image, so replacing the faulty image with the stock boot.img should fix the problem.

If I did the same I would first attempt to manually put device in bootloader/aka fastboot mode then fastboot flash the stock boot.img , sudo fastboot flash boot boot.img --slot all
I only read the op (first post here);but I betcha that would have worked. Then sudo ./flash-all.sh and let it do it's thing.