How To Guide Lock+Unlock Bootloader - Xiaoxin Pad Pro 2021 [TB-J716F]

[Mr.PvT]

Did you allow "OEM Unlocking" in the developer options?

of course man, I turned it on

 

[lee331]

 

[lee331]

I flash this after recieving it without using it first so it seems zui website didn't know my serial number yet

 

[lee331]

Can you flash default Rom on locked oem?

 

[russy23]

im being blind, but where the hell is the IMEI number

yea im being dumb, but the unlock sites want one?

 

[mardon85]

im being blind, but where the hell is the IMEI number

yea im being dumb, but the unlock sites want one?

There's multiple tabs. The 4th one is for tablets and doesn't ask for an imei number.

 

[russy23]

There's multiple tabs. The 4th one is for tablets and doesn't ask for an imei number.

thanks for some reason chrome asks for imei

 

[mardon85]

thanks for some reason chrome asks for imei

Select that option and no imei.

 

[russy23]

sorted it now, did it through the tablet, cheers

 

[lee331]

does anyone have version 12.6.238 ST ?
version 12.6.211 ST is not wroking for me

 

[lee331]

help device is corrupted and cannot be booted after i flash this my bootlaoder is lock and cant seem to unlock on zui website btw

 

[mingkee]

hmm..i'm not sure if i install the driver correctly. what should be shown in device manager? i did follow PHRS guide and installed the ADB driver but there is this !Android under Other Devices.
Any other driver that i need to install?

And should i be in bootloader mode or fastboot mode to run the command? I run the command at fastboot moder i will get the error above. If i run at bootloader mode will stuckedd at <waiting for device>

View attachment 5443697

Did you install LMSA/RSA?
If so, just use Moto ADB driver.
I use it for my Lenovo P11 and Yoga Smart

 

[Mr.PvT]

Lock Bootloader:
fastboot flashing unlock
Done

 

[lee331]

 

[RGC2597]

Sending 'unlock' (5 KB) OKAY [ 0.009s]
Writing 'unlock' FAILED (remote: 'Serial number not matched')
fastboot: error: Command failed


.................

 

[russy23]

I've unlocked then locked again..do I just flash the same file again to unlock..I'm going gsi..stock is doing my head in

 

[BakedinRC]

How To Lock and Unlock Bootloader - Xioaxin Pad Pro 2021 - TB-J716F

Since I found out that the Tablet supports Project Treble I'm trying to get a GSI-ROM running on it.
Currently with many trial and error I got LiR-ROM to boot.
The first step is to unlock the Bootloader so I thought I will share the process here.
Your data will be deleted while unlocking, try it at your own risk.

Unlock Bootloader manually
Requirement: PC with ADB Fastboot
1. Go to Settings -> System -> About Phone, tab on it until developer settings are enabled.
2. Go to Developer Settings and enable "USB Debugging" and "OEM Unlocking".
3. Open Console and enter "adb devices". Allow USB-Debugging if tablets asks.
4. Enter command "adb reboot bootloader".
5. Write down the serial number shown on the bootloader screen
You can either get the unlock image via this link "http://cdn.zui.lenovomm.com/developer/tabletboot/[your sn number]/sn.img" or via the webseite
5. Go to the ZUI Unlock Website and request the unlock image

View attachment 5432885

6. You should get a mail where you can download a file called "sn.img".
7. Flash the image with fastboot "fastboot flash unlock sn.img"
8. Enter command "fastboot oem unlock-go", bootloader will unlock now.
9. Restart with "fastboot reboot".
Done, your bootloader should be unlocked now.

Lock and Unlock Bootloader with Batchscript
I recently found a batch script for lenovo devices in an chinese forum and translated it.
It's easy and convenient to use. For unlocking you still need the sn.img from the ZUI Unlock Website.
Download BatchScript​

Ok stupid question but is the xioaxin the same as the Lenovo P11?

 

[russy23]

just when i cured one issue i get another , i locked the bootloader and it restarted and said Your Device is Corrupted and Cannot Be Trusted,i am stuck in bootloader now

 

[gunalarix8]

just when i cured one issue i get another , i locked the bootloader and it restarted and said Your Device is Corrupted and Cannot Be Trusted,i am stuck in bootloader n

Okay after you flash stock via qfil, please remain unlocked and install zui 13 ota offline install, after that format factory and try lock bootloader.

I was in the same case as you, i am able to lock bootloader now.

 

[russy23]

Okay after you flash stock via qfil, please remain unlocked and install zui 13 ota offline install, after that format factory and try lock bootloader.

I was in the same case as you, i am able to lock bootloader now.

Thanks but it's to late

Okay after you flash stock via qfil, please remain unlocked and install zui 13 ota offline install, after that format factory and try lock bootloader.

I was in the same case as you, i am able to lock bootloader now.

It's to late..I've borked it now..the bootloader is now in locked status..and for whatever reason the serial number has changed..

I have a £300+ paperweight