I am in need of some help, and the AT&T Support is utterly crap. I have a 2 GB (4G LTE) Data Plan but my phone seems to be messing up. Today (Because it is really really hot out, and the phone is in my pocket all the time, which makes it even hotter in my pocket)the phone reached it's milestone with me and got to 111 Degrees Fahrenheit. In an attempt to save the phone, I turned it off. Several minutes later, I turned it back on (Was at 96 Degrees now) and I noticed that I had no Data Connectivity. I had bars, but I didn't have the letters "4G LTE," or "4G." It was blank, but then it lost the bars completely. Then later on I had a "G" and "E" come up on the Status bar next to the Connectivity Bars (Which were full, I had all 5 bars). There are 2 pictures included here, one is with the "E" (Or EDGE connection of what I heard) and one is when the connection just drops a few minutes later.
Bootloader is Unlocked (via htcdev), installed with Custom Recovery (TWRP 2.8) and Root Access (SuperSU).
Android v4.4.2 with HTC Sense v5.5
(If you need more information please tell me below and I will do what I can to answer them, Photos were taken not too long ago, about 10 to 15 minutes ago from the Post of this Thread)