Why is my iPhone 4 always hot?

So is not really new but is not really old I had since October 2012:/ and everytime I video chat it gets hot. I'm always playing music an playing games and always texting but it never gets hot, is just everytime I video chat, why is it doing that.-. I'm not really a apple genius and I'm too lazy to take it to the apple store

I have the 5 and mine does it too. It just means everything is happening to fast for the phone to catch up, ya know? I'm not an apple person either but I actually learn why it does it this afternoon. I would consider not doing to much of the video chat and start doing texting and calling. Also when IOS 7 comes out I recommend you don't get it! It will heat up and it might break your phone since the newest iOS coming is for 4s and 5 mostly. I hope this helps and just minimize your video chat.

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