Vbmeta Samsung A12 _hot_ -

Connect your USB cable to your PC (but not to the phone yet).

Release the buttons when a blue/cyan warning screen appears. vbmeta samsung a12

If you are trying to root your device, install a Custom Recovery (like TWRP), or flash a Generic System Image (GSI), understanding and modifying vbmeta is absolutely mandatory. Failing to handle it correctly will result in the dreaded "Custom Binary Blocked by FRP" or a bootloop. Connect your USB cable to your PC (but not to the phone yet)