MI A3 stuck on Fastboot After Flash Solution

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

slots ourselves using a Fastboot command Changing Android's Active Partition Slot

fastboot change slot bootctl set-active-boot-slot SLOT - On next boot, load and execute SLOT bootctl set-slot-as-unbootable SLOT

fastboot set active slot getvar variable> Display a bootloader variable set_active suffix> Sets the active slot If slots are not supported, this does nothing boot kernel> [