Anyone else using a bluetooth headset or Built-in Car Bluetooth have issues with people on the other end saying its sounds muffled or like you are "underwater".
Wife has a G35 with factory bluetooth that worked great with her iPhone 3G, but since I got her the iPhone 4 about 50-75% of the time when she is in the car using the factory bluetooth it sounds muffled or underwater. Sometimes hanging up and calling back fixes it. And the same with me in my car, I have an aftermarket Kenwood stereo DNX-8120 that worked great with my 3GS, but I have the same problem with my iPhone 4.
Wife has a G35 with factory bluetooth that worked great with her iPhone 3G, but since I got her the iPhone 4 about 50-75% of the time when she is in the car using the factory bluetooth it sounds muffled or underwater. Sometimes hanging up and calling back fixes it. And the same with me in my car, I have an aftermarket Kenwood stereo DNX-8120 that worked great with my 3GS, but I have the same problem with my iPhone 4.