I just upgraded to the iPhone 5s and have an iPhone 4s I'd like to use as a dedicated dashcam. I will either buy a new car mount designed for an iPhone 5/5c/5s and use my current iPhone holder with my 4s to make it into a dashcam. Otherwise I'll buy a mount to use with my 4s and just keep using my old mount with the iPhone 5s, even though it's pre-Lightning and it holds the phone at an awkward angle. The main question here is, what are good iPhone car mounts that don't obstruct the back camera in any way? Thanks!