I try to flash incremental upgrade from 30/7... I got a dead phone boot into fastboot.
Then I try to flash MIUI 11 (flash_all), TWRP, SHRP..., (without vbmeta) then flash PE+ 30/7... Then install a full update (not incremental)... It works.
Not sure if I done it correctly.
All seems to work now... I did all of these without any password lock...
Then added password after all seems to work fine.
One thing I notice... The under screen fingerprint sensor doesn't work most of the time... Is that normal? Or is it Xiaomi using a cheap sensor? My other non Xiaomi phone seems to work fine.
Sent from my Mi 6 using XDA Labs