Does anyone know how to increase the bluetooth phone volume of a Pearl flip 8230? I pair it with a 2006 BMW 330. (My Motorola Razr works fine with the same car.) I can turn up the car to full volume, but the conversation is still too soft, and the person I am talking to says they can barely hear me. The volume buttons on the phone do not seem to work on a bluetooth call. The volume icon remains at 3 of 5 bars. I have fiddled with all the options I can find: Echo control, Automatic Volume Control, Enhanced Audio. It seems like the Bluetooth output is just set too low. Is there a way to adjust it?