I'm certain this never happened with my 4S, but I want to know if others have noticed this. 2-3 times a day, I have Bars and it says AT&T but I don't have LTE/4G/or any G. When I try to access data, it seems to 'restart' the cellular service and moments later I'm back online. This is new to me. Just trying to find out if its happening to others before I try to claim warranty on my launch day iphone 5. In other words, is it iOS, hardware, or bizarre coincidences.