Is anyone else having issues with using their iPhone with the Sony Car Radio MEX-BT3700, it used to work flawlessly with good call quality on 3.1.3 but since I got my iPhone4 with iOS4.01 the call quality is report as terrible by anyone I call. Is this a compatability issue with the BT3700 or is this a problem with iPhone4 or iOS4.01 can anyone advise?