How to change Android system boot slot form A to B

Checking for AB Partition Slot Support fastboot get active slot boot anymore and only fastboot is fastboot getvar current-slot current-slot: b Finished Total time: fastboot --set-active=b fastboot_ error_ failed to identify current slot If you device randomly got stuck in fastboot after a reboot, that means the counter hit zero and the bootloader marked your slot as unbootable

fastboot getvar currentslot Android phones can now have an A and a B partition system for the OS and we can use this fastboot command to check and see which slot is currently active