: Boot into TWRP and perform an "Advanced Wipe" of System, Data, Cache, and Dalvik.
Flashing Android 9 on an MT6580 device is a , but it is not for beginners . If you need a stable daily driver, stick with a debloated Android 7.0 (Nougat) or a lightweight custom ROM like Android 8.1 Go . mt6580 firmware android 9 install
It’s a hobbyist project with severe daily-driver limitations. For practical use, stay on . If you already flashed a broken Android 9 port, restore your stock firmware using SP Flash Tool and a backup. : Boot into TWRP and perform an "Advanced