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

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russy23

Senior Member
The Lenovo Region Lock also covers roll back. Its a real nightmare. I wish there was more public knowledge on how to avoid it.

The simple solution would be to have a Chinese version of smart recovery. Let people fix their own issue then.
to be honest Ive not been happy with this tablet since ive had it, hardware is good, software not so much, this has just put the icing on the cake, now ive got to shell out £60 to return it, to get a replacement or it mended, importing electrically goods is ok, as long as nothing happens
 

mardon85

Senior Member
Jan 8, 2009
501
64
Manchester
to be honest Ive not been happy with this tablet since ive had it, hardware is good, software not so much, this has just put the icing on the cake, now ive got to shell out £60 to return it, to get a replacement or it mended, importing electrically goods is ok, as long as nothing happens
I've been pretty happy with my 2021 P11 Pro it's tiding me over nicely while I wait for my 12.6" to come back (what a nightmare that has been). Having said that mine hasn't lost widevine.
I use Stremio and JustPlayer to play the 4k HDR versions of shows I pay for already through my Disney+, Apple, prime and netflix subs. It's mental I can't access the full quality of what I pay for on any device but hey ho. With Stremio widevine is irrelevant anyways.

BTW I paid £42 with UPS to return mine to China not £60+. Giztop have been great apart from their balls up of retuning me someone else's broken tablet have always paid return shipping.
 

russy23

Senior Member
I've been pretty happy with my 2021 P11 Pro it's tiding me over nicely while I wait for my 12.6" to come back (what a nightmare that has been). Having said that mine hasn't lost widevine.
I use Stremio and JustPlayer to play the 4k HDR versions of shows I pay for already through my Disney+, Apple, prime and netflix subs. It's mental I can't access the full quality of what I pay for on any device but hey ho. With Stremio widevine is irrelevant anyways.

BTW I paid £42 with UPS to return mine to China not £60+. Giztop have been great apart from their balls up of retuning me someone else's broken tablet have always paid return shipping.
Your right it's 42 via ups..like a plonker I walked in and try to send it like a normal parcel..didn't occur to me I need to print some pages out..try again tomorrow..how long did yours take to get back to giztop?
 

mardon85

Senior Member
Jan 8, 2009
501
64
Manchester
Your right it's 42 via ups..like a plonker I walked in and try to send it like a normal parcel..didn't occur to me I need to print some pages out..try again tomorrow..how long did yours take to get back to giztop?
First time around it was quick. 4 days to get there 3 days their end to mix mine up with someone else's then about 5 back. This time around I posted 28th and it's still being held by customs. From what I've read it could also be a backlog with UPS but they don't communicate very well.
 

russy23

Senior Member
First time around it was quick. 4 days to get there 3 days their end to mix mine up with someone else's then about 5 back. This time around I posted 28th and it's still being held by customs. From what I've read it could also be a backlog with UPS but they don't communicate very well
Yea I'm guessing so..if I get this sorted I'm not sure I'll keep the tablet to be honest..but that's to worry about in a few weeks
 

mardon85

Senior Member
Jan 8, 2009
501
64
Manchester
Yea I'm guessing so..if I get this sorted I'm not sure I'll keep the tablet to be honest..but that's to worry about in a few weeks
Try Stremio when you get it back. It may change your attitude.

I use Nexus launcher so don't see any Chinese ever. If my 12.6 came with exactly the same software and performance I'd have been very happy. Unfortunately it didn't. It was a mess
 

whynot4444

Senior Member
May 27, 2012
261
30
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
it say 404 not found, and when im enter serial, it alway said wrong serial
 

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    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

    ZUIUnlock.png


    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
    4
    @sakun-ice I got LineageOS to run on it today, but it still has 2-3 bugs.
    4
    Thanks @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 ~
    2
    Hello to everyone, can someone post the exact steps on how to lock the bootloader?
    Thanks
    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.
    2
    @zeroflame15 You have to be in bootloader mode. <waiting for device> is propably the driver.