How to change Android system boot slot form A to B

It may not flash TWRP as there is no active slot not bootable) If it is a slotted device in Fastboot run the command: fastboot getvar

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

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

fastboot getvar currentslot Boot your smartphone into Fastboot Mode · Now, connect your smartphone to the PC using a USB cable · Open a Command Prompt, Terminal, or