So I have had my iPhone 5s since Jan. everything is been great. On Saturday I got to work and it showed I had LTE coverage, but nothing would connect. I had switch off LTE for the phone to connect to the network. I thought maybe it was just a bad reception day, and didn't think twice about it. Well this morning I went to look something up on Safari, and the thing just would not do anything. I then try to do a speed test, and again nothing would happen. I then turned off LTE and emails started showing up from early in the day, and it connected to the network. I wanted to see if this would be something I need to contact AT&T about, or is there something wrong with my iPhone?