Is anyone else experiencing these problems? My LTE data on At&t will randomly stop working, and toggling airplane mode seems to fix it. When connected to Wifi, it is extremely slow and sometimes doesn't work at all (could be same issue causing LTE). Lastly, I have used 2GB of data and sent my family plan over the limit because apparently my phone is using cellular data while connected to Wifi. Could I email AT&T or Apple about this issue?