I'm on tmobile unlimited. I always get between 6 to 15 Mbps here at home all the time. Yesterday my mobile data went kaput for no reason, and since then it either doesn't work at all, or is very slow. It's acting strange. It's not just poor signal. I have bars, it doesn't go to edge but stays on H, but if I try to do something, it will not load, then my bars turn grey, and the H disappears. Still no E, just no data of any kind. I talked with tmobile for 2 hours, they have no idea and submitted it to their engineers to see if the network has a problem. I tried everything, including 2 factory resets. AND, my GFs nexus 4 is doing the EXACT SAME THING. Any ideas?