Checking Android's Currently Active Partition Slot

From there you can run fastboot getvar current-slot to see which slot you are on And you can change slots using fastboot --set-active=the slot

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

fastboot get active slot Display a bootloader variable fastboot set_active suffix: Sets the active slot If slots are not supported, this does nothing fastboot boot

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