Today, is about the third time I've noticed this happen. I'll be using my phone in Safari, and after a few minutes, the phone starts getting really, really warm. I look at my connection, and it has dropped from LTE to 4G, this is on AT&t, btw. I usually have a great signal on LTE, at least 4 bars, and 30-40Mbps. I've had the phone since day one and it's only happened a few times, but I can always tell when it has dropped to 4G, because the phone starts heating up very quickly. Curious to hear if this is happening to anyone else on here. I'm not real concerned with it at the moment, but it seems AT&T has some issues maybe with their carrier settings? I went out of town to an area that only has the 4G, or 3G, Saturday, and my phone would only connect to EDGE. After seeing my brother's 4S constantly connecting to 4G, I went ahead and it a reset, and sure enough, it started connecting to the 4G instead of the EDGE network.