Randomly Spazzing iPhone 6+

So, I recently got a brand new iPhone 6+ and it randomly spazzes out. It acts as if I'm touching it even if I'm no where near it. It doesn't seem to do any specific motion, just... random. It opens apps, swipes in-apps, and on the home screen. It hasn't seemed to do it on the lock screen weirdly enough. Could this be from a iPhone restore (from another iPhone 6+)? Should I take it back or is it a quick fix?

Thanks for any help! 🙂