To clear the phone's pairing information

On the watch:

1.

Check to confirm that the Bluetooth icon is not on the watch display. If it is, enter the Timekeeping Mode and then hold down C for about two seconds until the Bluetooth icon disappears.

On the phone:

2.

On the top menu of the G-SHOCK+ app, tap the following items in sequence: "General" - "Delete pairing".

3.

On the screen that appears, tap "Delete pairing".