Is it Normal for my iPhone 5s to get hot?

Okay so here's the problem sometimes when I use my phone for more then an hour it gets hot but when I had the iPhone 5c it didn't used to get hot when I use it for more than an hour. Why do you guys think it gets hot when I use it for more then an hour?

Its overheating. Most phones do it if you use it excessively.

IPhones do it because apple is cheap. The 5s was made cheaply. You should expect that.

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