How To Guide Lock+Unlock Bootloader - Xiaoxin Pad Pro 2021 [TB-J716F]
- Thread starter Tropaion
- Start date
Ungeskriptet
Senior Member
I can't seem to get the sn.img from the ZUI website. It's says that my SN is invalid even though it's right.
Do I need to wait a certain amount of time for Lenovo to save my SN while it is connected to Wi-Fi?
EDIT: Yes, about 8 hours. I have the sn.img now.
Do I need to wait a certain amount of time for Lenovo to save my SN while it is connected to Wi-Fi?
EDIT: Yes, about 8 hours. I have the sn.img now.
Last edited:
Ungeskriptet
Senior Member
Read my comment above...help i cant unlocked mine i keep getting Please enter the correct serial number even its right
Ungeskriptet
Senior Member
yes, i typed the unlock command but no success, i already have the sn.img file i used the command fastboot flash unlock sn.img but the error message is as above
sending 'unlock' (5 KB)...
OKAY [ 0.003s]
writing 'unlock'...
FAILED (remote: Flashing is not allowed in Lock State)
finished. total time: 0.009s
Ungeskriptet
Senior Member
lee331: Try restoring the firmware in EDL mode: https://xdaforums.com/t/install-stock-rom-xiaoxin-pad-pro-2021-tb-j716f.4347951/
You should have said that your tablet doesn't boot in first place.
You should have said that your tablet doesn't boot in first place.
Last edited:
Ungeskriptet
Senior Member
but im stucked at locked bios mode
is there anyway to unlocked or get the sng anywhere? tnks
Ungeskriptet
Senior Member
Similar threads
Top Liked Posts
-
There are no posts matching your filters.
-
16How 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
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 BatchScript4
You need to be on official Chinese ROM first. @Tropaion made a tutorial on how to flash it.
For locking the bootloader you need to enable USB debugging in developer settings.
Then plug in the tablet to your PC, open adb shell and type "adb reboot bootloader"
After it's rebooted to the bootloader type "fastboot flashing lock"
Then you're done and can reboot.
Few things to keep in mind: never unplug the tablet when flashing ROMs. Also the locking bootloader command doesn't always work and you might have to try a few times or switch between fastboot and bootloader.
Hope this helps, there are also a few topics on locking/unlocking if you're stuck.44Thanks @zxcv88
After installing the lenovo USB driver, the !Android in Other devices was updated.
Boot into bootloader mode and "fastboot flashing lock" runs without any issue
Appreciate all for the advise and help! Appreciate ~
