To transfer your AirPods to another phone, you will need to unpair them from the first phone. On the first phone, open the Settings app and tap Bluetooth. Tap the "i" next to your AirPods and tap Forget This Device. Once they are unpaired, put them in the charging case and close it. Then open the charging case near the new phone and hold down the button on the back of the case until a light flashes white.