@MrT10001 I searched but couldn't find it

@MrT10001 I actually found my version on Gitlab, it's the Halium 9

@Ian In the 'about' section, I only find the serial number, the Wi-Fi and Bluetooth address and the storage.

@kugiigi I don't know where I can find my version of UT, but I think that I'm not in the last version

I also have another problem: when I close the cover of my tablet, it turns on instead of off.

@messayisto I tried but it didn't work

@MrT10001 It's with UT. The round on the lock screen displays nothing even when I click on it.

@MrT10001 It works ! Thank you very much ! But I've got a little problem : the InfoGraphic on the lock screen displays nothing, even when I click on it. Is it normal?

@MrT10001 Ok, thanks ! I'll give it a try and let you know

@MrT10001 Oh, ok. But I can't find the official Android 9 ROM, can I flash something else such as LineageOS (the version based on Android 9 of course) ?

I've found the problem: when I want to reboot, TWRP tells me there's no OS installed. But I don't know how to fix it... I've followed all the steps and flashed all the files... Could you please help me?

Hello !
I've just try to install this built (https://gitlab.com/ubports/porting/community-ports/android9/lenovo-tab-m10-fhd-plus/lenovo-x606) on my Lenovo tab M10 FHD plus X606F. The link to downgrade the tablet to Android 9 didn't work, so I stayed with Android 10 and simply executed the commands given. But after a successful installation, the tablet wouldn't boot anymore, saying "orange state your device has been unlocked and can't be trusted your device will boot in 5 seconds" and then it boots indefinitely. Fortunately I was able to restore Android thanks to Lenovo's Rescue and Smart Assistant, but I'd like to be able to switch to Ubuntu Touch.

What can I do?

I probably need to switch to Android 9, but I can't find how to downgrade my tablet.