Sony XW-LF3-T Mode D'emploi page 26

Problem
Cannot hear the other party
during hands free calls, or
cannot hear the ringtone
from this unit.
26
En
Check the supported Bluetooth profile. Please use a Bluetooth
device that supports HFP or HSP .
Check whether the audio output setting for the Bluetooth device
that is connected with this unit is set to this unit. If not, set it to this
unit. For directions on how to do the setting, please refer to the
operating manual for the Bluetooth capable device.
Check that the volume of the Bluetooth device that is connected
with this unit is not set to low. If so, please turn the volume up.
If the situation does not improve after performing the above,
disconnect the Bluetooth device from this unit, and reconnect.
Remedy