I just got the S4, coming from the Droid Charge. The Charge had a dedicated vehicle dock that automatically put it into a Car Mode. When in Car Mode, as long as the charger was connected, the screen didn't time out or go off. On the S4, there is no dedicated car dock. I just got the iBolt xProDock which seems pretty cool. It does put the phone into a dock mode, but the only way I can keep the map on ( I use it for traffic, not so much for navigation) is to put on the Navigator. I like the Google Maps screen much better than the Navigation screen, but I can't figure out how to keep it going to sleep. Is it possible, or do I just have to get used to the Navigation screen?