How to automate slot selection after android AB-Update

I hoped I could find a phone that had an sd card slot and headphone jack but active on the screen, in the name of battery my Bluetooth connection buffers

If the bootloader implements fastboot, it should support the command set_active slot> that sets the current active slot to the given slot (this

fastboot set active slot 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

fastboot getvar currentslot Perdona, el comando fastboot ---set-active Ahora vamos a comprobar desde qué slot está arrancando el teléfono: Código: fastboot getvar current