If possible, move away from the noise source. The best option is to look for a quiet place during phone calls. This will also improve the sound quality for the person on the other end of the phone call. 

Use the volume control on the mobile phone to increase the volume of the call.

• The push button on the Bluetooth hearing aids themselves can be configured to adjust volume. If that is the case, during a call:
  • To make the call volume louder and to reduce the volume of the surrounding environment, use the push button on the right hearing aid
  • To make the call volume lower and to increase the volume of the environment, use the push button the on left hearing aid.

For further information regarding volume preferences, check the printed Getting Started Guide.