How to change Android system boot slot form A to B

How to change Android system boot slot form A to B change slot fastboot c:1182: ERROR: No bootable slots found I can boot to u-boot from the eMMC and use the command fastboot usb 0 to put it in fastboot mode change address on postcode lottery Fast boot times Ability to create or change themes Includes Retroarch PortMaster Cons Less frequent updates Linux style menu Currently in Alpha KNULLI

change address on postcode lottery Fastboot firmware, ZIP firmware is official from Xiaomi EU ROM, TWRP and Other files is unofficial Use at your own risk China 28

change slot fastboot Fastboot firmware, ZIP firmware is official from Xiaomi EU ROM, TWRP and Other files is unofficial Use at your own risk China 28 slot; don't forget to disable AutoReboot Start flashing the recovery 6 To change 7 Allow system modifications by