Hi! So, I bought a new phone two days ago (2015-12-27), and since yesterday (2015-12-28) my phone was heating up. I don't have a lot of apps that need a lot of load, nor do I play games/have any games on it. I mainly have Facebook, Facebook Messenger, Instagram, my bank's app, PayPal, Yahoo and Google Chrome. So, I was chatting with my friend via Messenger and going through Instagram, when I noticed that my phone was a little warm (the top of the back). I thought that it's normal for these kind of phones to get warm, you know? Then, I went home and after some time of going through the net and listening to music, it started getting warm again. This time, a lot warmer. But there still wasn't any messages that I saw people get that it's heating up. I didn't pay it any mind, but it started getting warmer, and the top of the screen started getting warm itself. Then, I let it cool (didn't do anything just locked it) and downloaded AnTuTu. Ran it a few times, turns out, the top of the battery (from the middle up) is getting warmer and warmer, as well as top of the phone (where the buttons/camera are (didn't use the camera yet)) and the top of the screen. Did a factory/hard reset - immediately after the reset, it was warm. Did some simple surfing the web (only downloaded Google Chrome), and it went warm again. What is the problem? Is it the phone itself? Can it be fixed? Or can it possible be the battery, do I need to buy a new one?