One reason I bought this car was because of the on-board cell system. I then had an Iphone 4. It worked well with this phone. As soon as I changed phones my new phone wouldn't stay entered into the on board computer. It would say it was entered and as soon as we hit the save button we lost it. The people in the service dept. state that it is a DEFINITELY problem with this phone and this vehicle. Anybody have an app they could write???