I have noticed that while I am on the phone recently I have been losing my 4g/3g coverage and it switches to Edge where I can't use data at the same time. I have an iphone 5 on ATT, and when I am not on the phone going through the same area it stays 4G the whole time. I don't think it is the cell phone coverage, but was wondering what is a good way to fix it other than hanging up and repicking up the call which seems to fix it when it does that. Any ideas or has anyone else had this issue? No LTE in my area.