After the process finishes, perform a Factory Reset from the recovery menu to ensure system stability. Maintaining the Downgrade
Downgrading an ASUS ZenFone 5 typically involves manually flashing an older firmware version. This process is most common for rolling back from Android 10 to Android 9 or moving from Lollipop to KitKat on older models. Zenfone 5 Firmware Downgrade
Tap the and disable "Auto-download system update". After the process finishes, perform a Factory Reset