Perform a FYTBACKUP or similar system backup if possible.
Before attempting an update, verify that your device matches these common specifications for the sp9853i_1h10_vmm build: Spreadtrum SC9853i (Intel Airmont architecture). sp9853i 1h10 vmm firmware update
Navigate to Settings > System > About to confirm your exact firmware build and MCU version. Perform a FYTBACKUP or similar system backup if possible