All of a sudden my apps do not work properly if I am not connected to wifi. I can still make/receive calls & texts at anytime. For example: I went to use the maps & directions when driving home, it could not verify my location. I tried using Soundhound off my car radio, it said the signal was weak. ESPN app was not getting updated scores. Even my emails are not coming through on 3G. I have full bars and the "3G" on the top of my home screen.