I've tried searching the forum (terms like usb and ipad show nothing, and usb and iphone show pretty much everything), but when you plug an iPhone into the usb port, is it treated like an external audio source that plays through the media system, or does it just charge? I'm asking because I have to plug my iPhone into USB to get a reliable connection on my infiniti (bluetooth will drop the connection after 10-30 minutes of playing audio and I need to shut off bluetooth and come back to have it reconnect), and it sounds like the BT on the S is similarly flaky for some (many? a few? hard to tell on forums) folks. Given that I have issues with my Infiniti, I'm just assuming I will have issues with an MS.