Apple announced CarPlay today and this sounds awesome. Here is an important question. If the CarPlat screen is using your iPhone for Navigation, what happens when a phone call comes in and you are on Verizon or Sprint (CDMA carriers)? The way it works now, is that you cannot do voice and data at the same time, so if I am navigating and a call comes in, will mapping stop working? If you are using TomTom on your iPhone, you won't have that problem, BUT iOS Maps requires a data connection to work.