that block booting if the build fingerprint does not exactly match the vendor partition.

Which is your device currently running?

Using this tool requires an unlocked bootloader and a custom recovery already installed on your device.

In simple terms: if you have ever tried to flash a non-official system image onto a recent Samsung phone, you have likely encountered errors related to , file-based encryption (FBE) , userdata encryption , or dm-verity preventing boot. This tool surgically neuters those barriers.