How to change Android system boot slot form A to B

It means fastboot is waiting for a phone to be connected If the phone is physically connected but fastboot cannot find it, then either the

slots ourselves using a Fastboot command The Real Reason Why Music Is Getting Worse

fastboot_ error_ failed to identify current slot Flash all partitions from $ANDROID_PRODUCT_OUT On AB devices, flashed slot is set as active Secondary images may be flashed to inactive slot

fastboot set active slot stack trace: Error: failed to set active slot: Error: {error:{code:1,cmd:fastboot --set-active=b},stderr: waiting for any device >