The headset cannot be operated.
- When you change the assignment of the functions to the buttons on the left and right headset units with the “Sony | Headphones Connect” app, confirm on the app that the correct functions are assigned to them.
- Charge the charging case.
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Set the headset units into the charging case, and close the charging case lid.
You may be able to resolve some issues by setting the headset units into the charging case. - Reset the headset.
- Initialize the headset, and pair the headset and the device again.
