Hi all,
I recently got a refurbished MI A2. It came with Android 10.
I unlocked the boot loader and rooted it (thanks to XDA forum !). Then i tried to flash Ubuntu Touch.
The Ubuntu recovery was installed without any problem and operational. But the whole OS installation met an error. I choose "Ignore" but starting Ubuntu failed. Unfortunately I didn't noticed the exact error...
As it is my only phone which is supposed to replace my old GSM, I flashed the Xiaomi stock ROM. After some manipulations it worked again.

Could Androïd 10 be the reason of the failure ?

BTW : after flashing the Xiaomi stock ROM, the device was only partially working : I couldn't install some applis (e.g. Firefox). It said : "External storage needed for appli". Even chrome failed, and magisk too. They repeatedly crashed... I couldn't find any reference to this error message on Internet, so today I managed to make a reset to factory settings and now it looks fully OK again...

But I'd like to succeed installing Ubuntu Touch !
Must I downgrade to Android 9 ?