[Help] Can't unlock bootloader - Shield Tablet Q&A, Help & Troubleshooting

I just got a new Nvidia Shield K1 tablet. It installed OTA to marshmallow latest. I try to root, I follow instructions. Getting stuck on first step, of unlocking bootloader.
adb reboot bootloader - works no problem
fastboot oem unlock - just says 'wait for tablet' but tablet doesn't have any option on bootloader to unlock recovery. just has continue (boots android normally), fastboot protocol (goes back to the same screen), recovery (goes to some recovery where it's doing nothing), etc. i try every option, apparently it is missing option to unlock bootloader?
tell me which infos i should provide to help troubleshoot, thanks

NVM, solved it.
had to sudo when doing fastboot oem unlock.

Related

[Q] Unrecoverable bootloader error - Bootloader locked

Hi,
I would like to know if there is anyone who knows how to unlock the bootloader on a TF300T with the Unrecoverable bootloader error. I have access to fastboot, yet the "fastboot oem unlock" command doesn't unlock the device.
The entire device is wiped due to following another tutorial for fastboot to recover from the bootloop error, so there is no more way to enter recovery or cold start android... the device has two options, fastboot mode, or being stuck at the asus logo untill the battery runs out. Adb doesn't recognise the device, even with windows drivers installed.
I can't flash anything with fastboot as the bootloader is locked.
Is there a way to unlock the bootloader, or is it gonna cost me repairs?
Grtz

Can not unlock bootloader

I can't unlock bootloader on my OPO. I tried command: fastboot oem unlock, and fastboot mode is responded with restart to TWRP.
Also I tried a lot of things that i found forums but they did not work. I can't flash anything.
I read somewhere that I can't unlock bootloader without OS installed, but I flash Cyanogenmod 11 (not 11s, and I don't know how), and then I got this problem: https://www.youtube.com/watch?v=jlhBVj89oxU , and my bootloader is still locked.
Does anyone have solution?

Bricked Pixel 2 - locked bootloader & no access to developer options - please help

Bricked Pixel 2 - locked bootloader & no access to developer options - please help
Hello guys, I just bought myself a Pixel 2 device today and decided to have a go at some changes: I've unlocked my bootloader of my Pixel 2 to perform TWRP flashing & Magisk installation and afterwards I decided to revert to stock.
The first step that I did when trying to revert to stock was to relock the bootloader via adb because I thought (big mistake) this will also revert everything to the factory image. Problem is right now the device isn't booting anymore (so I cannot change anything in developer settings and the bootloader is locked).
Fastboot does work now (I get an "FA8271A02780 fastboot" message when typing fastboot devices) but I cannot flash anything (it always says FAILED: remote Flashing unlock is not allowed.
I tried the Deuces script and UAF but they don't work (because my bootloader is locked). Given that I cannot unlock it, is there any way of flashing the stock image on my device? Any help is appreciated. Thanks a lot.
Sadly I don't believe so. Google doesn't allow us to flash anything without bootloader being unlocked. Other OEMs either have a program or allow you flash signed roms with a locked bootloader. For the trouble iTunes is at least you flash firmware through in the event of a Brick

TWRP / Unlock Bootloader on Cubot P30 (MT6763V)

Hi guys,
im looking forward to unlock the bootloader on my Cubot P30.
The phone is responding in USB debugging moder over the shell, for example when I´m typing "adb devices" or "fastboot reboot bootloader".
But in fastboot afer restart the device unfortunately doesn´t respond.
I even dont really know if the Bootloader is locked or not. The OEM Unlock slider under developer settings is set.
Furthermore The Recovery menu is in chinese, so i also dont know if there is a chance to doublecheck.
I tried flashing an Image over the Shell in case the booloader is unlocked but without success.
Also I cant´t find TWRP for this device, it seems there is no support for Cubot P30, isn´t it.
Hope there is a chance to update the device to Android 10 or Lineage, thanks in advance.
Update: The device is now unlocked. I flashed the Lineage 17.1 and unfortunately the device is still rebooting. Has somone a working image for this device?
Hello, how do you unlock your phone?
Mine Is P40 and same issue.
So if you tell me the way i really appriciate.
Thank you.
Unlock Bootloader & Root Android
Flashing process
1. Unlock Bootloader on Android Devices:
getdroidtips.com/unlock-bootloader-via-fastboot-on-android
2. Install custom recovery:
twrp.me/Devices
3. Root [Download & install supersu.zip via twrp, or root using magisk]:
getdroidtips.com/root-ulefone-power-6

zte a7 blade 2019 instant switch to os from fastboot*

Hi, i am loading booting to bootloader from adb with commnad (adb reboot bootloader) this isnt working, only restart its instantly switch to normal os, any ideas ?
Run
Code:
adb reboot
or
Code:
fastboot reboot
oh sorry man, i am idiot, and i am say it wrong.. I trying boot to fastboot but not working instantly switch to os, any ideas please ?
Unlock bootloader if not done yet.
where i unlock bootloader ? In developer settings ? (i have unlocked)
Enabling OEM Unlock in Developer options doesn't unlock the bootlader, it simply prepares the bootloader to get unlocked via fastboot command.
More info here:
How to Unlock Bootloader via Fastboot on Android
Unlocking the bootloader via Fastboot is the easiest thing to do. But not all Android devices support straightforward bootloader unlocking. Many manufacturers put up a setup on their devices to let…
nerdschalk.com
xXx yYy said:
Enabling OEM Unlock in Developer options doesn't unlock the bootlader, it simply prepares the bootloader to get unlocked via fastboot command.
More info here:
How to Unlock Bootloader via Fastboot on Android
Unlocking the bootloader via Fastboot is the easiest thing to do. But not all Android devices support straightforward bootloader unlocking. Many manufacturers put up a setup on their devices to let…
nerdschalk.com
Click to expand...
Click to collapse
Only I have a small problem I don't unlock my bootloader via fastboot when it doesn't work :/ It immediately jumps to my system when I boot fastboot, even with a command like ,,adb reboot fastboot"
Matyas66055 said:
Only I have a small problem I don't unlock my bootloader via fastboot when it doesn't work :/ It immediately jumps to my system when I boot fastboot, even with a command like ,,adb reboot fastboot"
Click to expand...
Click to collapse
I have new thread, where i am writing all info :/ https://forum.xda-developers.com/t/zte-blade-a7-2019-fastboot-mode-missing.4462035/
I don't know if you are still interested in accessing Fastboot but you can access it using a specific firmware version.
Still, let me tell you that unlocking the bootloader is virtually impossible. Since the well-known generic method doesn't work for the SoC SC9863A, you need to have a special Fastboot's program version and a dedicated private key that only they provide.... and I emphasize the word "dedicated" since apparently ZTE did not use a generic key to sign their ROMS. At least on this device.
Unless they decide to release the key or give support to unlocking the bootloader, all we can do is wait for them to change their minds. Because they don't want to provide it. I know because I tried to order it several times.

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