I experience a lot of gaming problems in my brand new iPhone 5s?

I just bought an iPhone 5s a month ago and I'm not able to play any game. When I play games bigger than 108mb the graphics is glitchy.a lot glitchy and small games like hill climb racing and fruit ninja lags a lot… The phone also heats up a lot… The phone is brand new and I bought it from the official Apple Store only not from anywhere else so if you guys now the reason for this and the solution please tell me… Thanks!

Could be a defect in the phone. Back it up, and bring it back to an apple store and have them look at it. If they see anything wrong, they could swap it out for a new phone for free, if it has been only a month. Then restore the backup and all of your content will come back.

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