Hi all, I just got a new iphone 5s with AT&T and noticed that if I keep LTE on, my signal will often dip to 1 circle (bars) and then I would completely lose internet/cell service. To fix it, I have to turn on and off airplane mode, and wait for a while for everything to reset. The only way I've found to go around this issue is to turn off LTE...but this kind of defeats the purpose. Has anyone else had this issue? I'm wondering if this is a hardware or software issue. Thank you.