white blackerry curve 9360 will swap for an iphone 4 or 4s *

got a white blackberry curve 9360 had it for a while just got scratches from being in my pocket with my keys nothing to bad, think its locked to o2 not sure, works perfectly fine nothing wrong with it. been wanting and iphone for a while would take an iphone 4 or 4s for it. the picture i put up is from google images as i dont have any other way to take a picture of it but thats what it llooks like