I've got a new AT&T iPhone 5 that seems to work fine. When LTE is available, it connects and is very fast. However, occasionally, when I wake it up and unlock it, I have an "E" showing and data throughput is near zero. I wait and wait and the "E" never goes away. The only way to reconnect to LTE or 4G is to reboot the phone. After a reboot it connects fine to whatever network is available. This is my 3rd iteration of the phone (3G, 4, 5) and I know the areas I'm in have solid 3G coverage. None of my previous phones ever switched to Edge. Is anyone else seeing this? I tried resetting the network settings and the problem still pops up. I can't repeat it - it seems totally random.