Phone calls

• The caller’s voice cannot be heard.

• Check that both the headset and the BLUETOOTH smartphone or mobile phone are turned on.

• Check the connection between the headset and the BLUETOOTH smartphone or mobile phone. Use the smartphone or mobile phone and make a BLUETOOTH connection (HFP or HSP) again.

• Check that output of the BLUETOOTH smartphone or mobile phone is set for the headset.

• Check that the volume of the headset is not set too low.

• Turn up the volume on the BLUETOOTH smartphone or mobile phone if necessary.

• If you are listening to music using the headset, stop playback, press the POWER button and talk.

• Low sound from the caller

• Turn up the volume of the headset.

• Turn up the volume on the BLUETOOTH smartphone or mobile phone if necessary.