Xiaomi Mi 9 SE

Although this device is A-only, you have to choose GSI for A/B devices because this device is "system-as-root".

Tested with LineageOS GSI from AndyYan (build 20190609)

Steps to install

Unlock bootloader
Boot in Fastboot mode
Flash TWRP fastboot flash recovery twrp-3.3.1-2-grus-20190609.img
Right after flashing press VOLUME UP + POWER to reboot in recovery
In TWRP Swipe to allow modifications
In TWRP reboot to bootloader
Flash vbmeta to disable verified boot fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img
Reboot to TWRP
Tap on advanced Wipe menu and wipe cache, dalvik, data and system (and optionally internal storage)
Reboot to TWRP
Copy GSI ROM and Gapps to phone
Tap on Install > Install Image > select image, and flash it to system
Reboot to TWRP
Install GAPPS If the installer gives error 70 go to Wipe > Advanced wipe > Select system > Repair > Resize filesystem Then Flash again GAPPS
Factory reset
Reboot to System

Component	Comment
Camera	Works, only front and middle back cameras available
Speaker / Mic	Works
Bluetooth	Works
WiFi	Works
SIM / Mobile Data / Voice	Works, LTE+ works. Some GSI force 3G only, type ##4636## and set LTE If that doesn't work use primary slot instead of secondary
VoLTE	Not tested
Fingerprint	Works, broken on Always on Display (turn screen on first)
NFC	Not tested
Wireless Charging	Broken, the screen flashes light blue instead of showing charge animation

Tested By: