Two weeks ago purchased F700BT from Car Toys and had them install it. In first week, touch screen froze 4 times. There was no discernable trend I could notice that would cause this. Car Toys ended up replacing the unit. This week it the new unit has frozen twice this week. I have noticed that the the unit freezes when I leave the iPhone in the my truck, not connected to the unit, and then 30 - 40 minutes later come back - start the truck - unit is frozen (satellite radio still playing).

 

Has anyone had a similar problem? If so, how did you resolve it?