How do I connect the Osmo 8 gimbal to another smartphone?

You can do either of the following:

1. Disconnect the Bluetooth connection with the current smartphone, turn off the Bluetooth of the smartphone, and pair the gimbal with another smartphone.
2. When the gimbal is powered on, press the shutter/record button, switch button, and trigger simultaneously for two seconds to clear the existing connection, and then connect the gimbal to another smartphone.