Database Users

Unbricking Zte Open C (Firefox OS)

Hello,
After an unsuccessful attempt to upgrade a firefox OS phone from 1.3 to 1.4, I bricked it
This is the current status :
It is a ZTE Open C. Bought at LDLC. I am not fully sure whether it is a FFOS_EU_EBAYxxx or a FFOS_FR_ZTE_OPENC.xxx
Normal boot: it does not go beyond the firefox logo and gets stuck there
If I boot in FTM mode (volume down and power), I see it when I do fastboot devices.
It does not go in recovery mode any longer, after I did : "fastboot flash recovery recovery-clockwork-6.0.3.3-roamer2.img". Before that, I did manage to go in recovery mode, but none of the zips I tried would work. I would get an unsuccessful signature verification all the time.
In recovery mode - when it was working - I was unable to see the device with adb devices nor fastboot devices.
I do not believe it is rooted.
Help appreciated

If you have bought your device on LDLC (french online shop) it's a FR version.
Try to flash the image provided by ZTE France here (tool is for Windows only) :
http://www.ztefrance.com/downloads/Pack_root_du_ZTE_Open_C.zip
(this is a "rooted" image so that you'll be able to compile & flash your own FirefoxOS afterwards )

[SOLVED] Unbricked (and successful upgrade)
Thanks for your reply!
Actually, we finally managed to unbrick it.
In case somebody else is looking for this, the procedure is detailed here.
In our case, as adb wasn't working, we booted in FTM mode (volume down and power), were we could use fastboot.
Then
fastboot devices
fastboot boot cw_recovery_dp.img
when screen goes black, adb shell /sbin/black_screen_fix.sh. In our case, this does not seem to do anything? we do control c
adb shell /sbin/cw_recovery.sh. This works great.
We get a recovery screen from which we can apply updates without being bothered by 'invalid' signatures
Regards,

P9 Lite VNS-L21 won't boot into TWRP

Hello
As menitoned, my phone won't boot into TWRP, it does boot into Android 7.0 EMUI 5.0, can boot into revolutionary recovery, but no, not TWRP... Bootloader is unlocked! Please help

Are you certain it's not booting into TWRP? The reason I ask is I thought I couldn't boot into the custom recovery programme either: it kept loading EMUI, using the phone's buttons. In my case, ver.4.1.1
Have you tried booting via ADB commands? I had reloaded a stock update, then unlocked the bootloader for a second time, only find the same scenario. It wasn't until I tried rebooting with ADB that it actually loaded TWRP.
In case you aren't familiar with the commands. Install ADB Tools, then open a command window from the correct folder location, where ADB tools are installed. To check the PC recognises the device, use:
adb Devices
it should show the device's serial number {I think}. Then:
adb reboot recovery
it should reboot into recovery mode. If TWRP has been installed correctly, it should load into it. Otherwise...I don't have a clue what the issue is. All the best.

Can't get into bootloader?

Hey guys, I've been trying to unlock my bootloader so that I can try and root my Maven 3 via Magisk. The problem is, I can't get into the bootloader. If I try to reboot to the bootloader from recovery mode, it just restarts like normal. Same thing when I try using adb commands in the cmd prompt. I am on Windows 7.

I think it could be unlocked trought EDL mode. But we need some expert help

I unlocked my phone with at&t but I think it only unlocked the SIM.
I enabled usb debugging and oem unlock, but when I issue the command (in ubuntu term)
adb reboot bootloader
Click to expand...
Click to collapse
is just boots into the android system.
Any clue on what to do?

I have the same question - bootloader mode will not load when I issue "adb reboot bootloader", nor will it go into bootloader when I go into recovery mode (via POWER + VOLUME UP) and then I choose the "Bootloader" option. The phone just boots into the system. When I use "adb reboot recovery" it does go into recovery mode, and I am able to get a shell and copy files via adb just fine. I am using the latest platform-tools.
This is a ZTE Z835 (Maven 3), AT&T, carrier unlocked phone.

I don't think there is a bootloader... I have not found any fastboot-compatible mode on this device nor have I heard anyone else find one. You have FTM mode (Power + Volume Down) and EDL mode (adb reboot edl). EDL mode lets it work with QFIL, and with QFIL, you can literally dump and modify any partition on the device you want... I'm not sure what else you want. There's a new method for unlocking the bootloader https://www.xda-developers.com/unlock-bootloader-zte-phones/. I found that my devinfo partition was already unlocked, but you may need to check. I'm going to try and figure out how to create a recovery.bin partition able to be flashed in QFIL.

[HELP] Installing Custom Recovery

Hello,
I've been trying to install twrp recovery using adb today.
Here are the adb command i used;
Code:
adb reboot bootloader
fastboot flash recovery twrp-recovery.img [i](It says success/finished.)[/i]
fastboot reboot
after that, I reboot to recovery using;
Code:
adb reboot recovery
But unluckily I still got the stock recovery.
Anyone knows how? cuz' I wanna flash a custom rom from here.
Thank you in advance!

Did you root

Oh do I need to root my phone first?

Up?

Have you unlocked bootloader??? Just do if not by unofficially method....then enable developers option in setting....enable adb debugging....now search on web twrp 3.2 for asus zenfone max pro m1 and flash it as you done before...after flashing press and hold volume down button immediately press and hold power button...after 10 seconda it will boot into twrp recovery boot.

Bap062 said:
Have you unlocked bootloader??? Just do if not by unofficially method....then enable developers option in setting....enable adb debugging....now search on web twrp 3.2 for asus zenfone max pro m1 and flash it as you done before...after flashing press and hold volume down button immediately press and hold power button...after 10 seconda it will boot into twrp recovery boot.
Click to expand...
Click to collapse
I did unlocked the bootloader.
I did enabled developers opt.

So you have to flash twrp 3.2.x version

Trying rebooting to recovery through hardware buttons rather than command line

A2017G revert to stock questions

Good afternoon
I have an A2017G with a mod rom android Pie installed on it and with TWRP 3.2.3-0L v1.3
I'd like to revert it to stock in order to sell it.
I can't access to EDL mode with the keys combo, nor with "reboot edl" in a terminal on the phone, nor with "adb reboot download" on my ubuntu machine.
I can access the system (the rom) fine and also TWRP.
Any advice to fix that, any file to flash from TWRP, without screwing up vendor partition, imei, or whatever?
Thanks.

in twrp for zte there is an option to reboot to EDL

Voenix said:
in twrp for zte there is an option to reboot to EDL
Click to expand...
Click to collapse
Well, it just powers off...

chironfr said:
Well, it just powers off...
Click to expand...
Click to collapse
EDL mode has only black screen,
Maybe its online check Qcom bulk or some qualcomm 9008 port in device manager (if its on black screen)

Thanks.
I have sorted it out after digging deeply
Main thing to understand: it's not possible to relock it with nougat oreo or pie installed on it.
So I have:
- Copied all my stuff (pics, vids, books, etc...) to my computer
- Set up a clean W10 on a dedicated machine, without any antivirus crap, installed original qualcomm drivers, ADB toolkit and axon 7 EDL tool on it.
- backed up all partitions with Axon 7 EDL Tool
- from TWRP wiped system, data, storage.
- downgraded to the official original rom (Marshmallow) available on the page EDL
- flashed TWRP on the phone
- installed TWRP_UnlockBootloaderPackage_by_DrakenFX.zip with TWRP
- rebooted to fastboot, then I could finally type from ADB "fastboot oem lock", and that's it!
- The phone rebooted properly, asked me for the country, but since I want to sell it, I didn't go any further.

chironfr said:
Thanks.
...
Main thing to understand: it's not possible to relock it with nougat oreo or pie installed on it.
...
Click to expand...
Click to collapse
In fact, as mentioned by Axon 7 EDL toolkit's author in this post https://forum.xda-developers.com/showpost.php?p=78267172&postcount=200
at least with Marshmallow and Nougat (supported by the toolkit), you can first enable fastboot (unlock fastboot) with the toolkit on stock Marshmallow or Nougat, then use "fastboot oem lock" to lock bootloader in bootloader (fastboot) mode.
Remember to use stock ROM (either by flashing with FULL_EDL package, or by using stock recovery applying to official ZTE update.zip, otherwise the phone would be bricked. User data will be erased (equivalent to factory reset).