If you are staring at a black screen with red text warning you that on your Samsung Galaxy Grand Prime Plus (also known as the J2 Prime, model number SM-G532G ), you are not alone. This is one of the most common errors encountered by users attempting to modify their device’s software.
The purpose of dm-verity is to ensure the integrity of the Android operating system. It checks the system partition block-by-block every time the device boots up. It verifies that the data on the partition matches the signed hash expected by the manufacturer (Samsung). g532g dm-verity verification failed fix file