Orange State Your device has loaded a different operating system. Then a 5-second boot delay. That’s vbmeta shouting, “I’ve been tampered with!” Technically, yes – but with consequences.
But even then, the first time you boot with a custom vbmeta , the Knox warranty bit trips. That’s permanent. No reset. No reversal. On a stock A12 (SM-A125F/DSN, for example), inspecting vbmeta reveals: vbmeta samsung a12
Here’s the kicker: the A12’s vbmeta partition is signed with Samsung’s production key. If you unlock the bootloader (via OEM Unlock in Developer Options), Samsung still doesn’t trust you. You must flash a custom vbmeta with the flag --disable-verity and --disable-verification . Orange State Your device has loaded a different
Using avbtool (from AOSP), you can create a stub vbmeta : “I’ve been tampered with!” Technically