my noob guess, (only because of my experience. and knowledgin' up) is that 4g testing affects 3g also...(that's what been going on, according to a V'n store manager...)...he says 4g is getting tested all over and is affecting everyone, even 3 g'ers (boonie workers like me). ...made it seem like it will be soon resolved.. when testing is completed... (in the mean time, best/"simplest" temp fix is go airplaine mode then immed out. 2 min later I'm restored...(WE SHALL NOT BE CONTENT WITH THIS!!!... (-- me, feeling kinda middle age n Ironcladdesque about the matters....)