Are you turning the volume control on the car or your phone? When on a bluetooth call, try turning the volume control on the radio (or steering wheel) and see if that helps. The volume on the bluetooth should be controlled by the bluetooth device itself (in this case, the bluetooth device is the car).I have my phone set up with the bluetooth in my car. It works perfectly normal on my phone but for the audio portion you can barely hear anything at all even when you turn it up super high. It used to work fine and I haven't made any changes to it since it worked. Anyone have this issue or have any idea why it isn't working? Thanks!