Even with the default music player if I'm playing any songs or anything, the process just stops midway. I think it started happening after there was a software update recently a couple of weeks ago. Also, I have installed this app called "GO Launcher" and "GO Locker" etc. Could this have something to do with it? There are no other problems really. The video works fine and no other problem to speak of. Also, this is my first smartphone and I don't know much about them, so I was just watching a movie on my phone and I noticed that the screen and the backside are both pretty heated up. Is this normal? Should I refrain from prolonged playing of videos and such?