Sony MDR-1000X Owner's Manual

If the pairing information was deleted by initializing the headset, etc., delete from your iPhone the pairing information for the headset, and then pair
them again.

The headset can be paired with multiple devices, but can only play music from one paired device at a time.

Hint

The above procedure is an example. For details, refer to the operating instructions supplied with your iPhone.

To delete all pairing information, see “

Initializing the headset to restore factory settings

.”