Today I used GPS on my iphone for the first time using the same window mount that I used for my old phone (evo). My gps turned off and I got a message that my phone needed to cool down. I took it off the mount, removed the case and it was indeed very hot. I held it in front of the vent for a couple of minutes, left the case off and then attached it again. ~15 minutes later it overheated again, and then once more on the way back from my destination. Is anyone else having this problem? I am in Austin, and its hot (~90-95 degrees out) but I never had this problem with my old phone.