No the battery is not swollen whatsoever, it looks completely normal and does not overheat whatsoever. And my brother has the same phone (2nd replacement [yes, hes having it even on the 2nd replacement]) and had it replaced because he had the exact same issue...we thought we just got a bad batch of phones, so when he got it replaced and the problem persisted...he seemed very surprised. He is very frustrated. This problem seems very, very common.
The phone does not
fully shut off, but rather freezes, or maybe the digitizer fails, I'm not sure 100% sure what, but I know it doesn't shut off. I found this out because the LED indicator does not go off when one of these incidents occur (charging [green], low battery [red], text [blue blinking], etc.) So i have come to realize that the phone does not shut off, but rather freezes...or something that disables me from turning the screen back on. Any ideas?