Iphone 6s screen becomes unresponsive intermittently?

I have an iphone 6s 32gig and it is brand new. But as i've been using it, the screen will out of nowhere become unresponsive and the only thing i can do is lock the phone then unlock it and it will work again but sometimes only for a short while then it happens again. Can anyone tell me what i could do to make it stop doing that? Anyone have the same problem with their screen?

Try holding Sleep/Power button and Home button both down at same time for about 10 seconds till the apple logo shows then release both buttons immediately. This should fix the issue

It is.