Switch the call between phone and headset
To switch the call from the headset to a compatible phone, press and hold the
power/call key and the volume down key simultaneously until the headset beeps,
or use the respective function in your phone.
To switch the call from a compatible Nokia phone to the headset, press and hold
the volume down key. On some phones you may need to press and hold the power/
call key and the volume down key simultaneously until the headset beeps.