IPhone 5s keeps doing this weird freezing thing?

So I just got my iphone 5s and recently whenever I'm using it, the thing does this weird freezing like thing and then after about a minute it goes to the apple logo and relaunches my device again. How it happeneds is whenever I'm using it and I'll try to go home I'll notice the home button won't work, and all buttons now don't work but the screen is fine and so is sound, and then a minute later it will just go back to the apple logo, and then to my lock screen. My os is up to date, and I've never gone on any sketchy sites, but I did download a gameboy advance emulator and Pokemon emerald (but the freezing happened before I got it).So I'm just really worried and wanna know how to stop this and wether or not I should bring it back to the apple store/verizon.

Hmm I think I would make an appt at hte apple store and show that to them… Assuming you can recreate it. Close all background apps, maybe you are running something weird on it.

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