Unlocking the bootloader

Beware of the vendor

Unless otherwise specified, all ROMs here are for the R or Q vendors

TWRP (Q, R)

TWRP (S)

LineageOS Official, No longer supported

Warning: installing through TWRP does not work. You need to use the LineageOS recovery

• Download
• LineageOS wiki page

Restoring to MIUI

Restoring IMEIs

Ubuntu Touch

Ubuntu Touch for this device was abandoned for a while, but it seems like it was updater recently. I'm not actively following the situation.

PostmarketOS

I tried making a port for this device, but failed. Hovewer, parts of the kernel were recently mainlined, so check the wiki for updates.