Earl Grey

Hi folks - I am new to this forum and have recently bought a 2008 GS450H se. I have an iphone 4s which I cannot sync with the car - more importantly, when I am using the phone on the move my transmission is intermittently muffled - and it is not being caused by the network or phone. Has anyone else had similar experiences? The main dealer said they would look into it, but that it was not covered under warranty as it is classed as ICE - any suggestions gladly received, cheers