How to change Android system boot slot form A to B

To enter fastbootd mode, bootloader writes boot-fastboot into the command field of the BCB message and leaves the recovery field of BCB unchanged (to enable

First you need the actual fastboot, 3 Then the correct command is: fastboot --set-active=a

fastboot get active slot slot; don't forget to disable AutoReboot Start flashing the recovery 6 To change 7 Allow system modifications by

fastboot_ error_ failed to identify current slot Execute magiskboot repack to repack the boot image, and you will get a file, flash this file to device by fastboot INFO Official