Probably your system partition (or any of the others) is not in original shape (eg by rooting,…). Then OTA update is not possible (only manual). You’ll find more details in recovery when you go to advanced-> copy log-> copying logs to SD card.
Probably your system partition (or any of the others) is not in original shape (eg by rooting,…). Then OTA update is not possible (only manual). You’ll find more details in recovery when you go to advanced-> copy log-> copying logs to SD card.