My iphone 4s keeps freezing

I've had my iphone 4s since the middle of March. Today my phone keeps freezing, wheither i'm on a app or just on the lock screen. It freezes for about a minute then goes to the screen that shows up when you turn off the phone(the one with the white circle in the middle) then goes to my lock screen? What's going on with it?

You know what, I'm having the same problem today! My apps keep crashing a lot! It angering me. It's a good possibility that it could be because your phone is jailbroken - if it is.

Sounds like a hardware problem.return it for a replacement