I have been using my iPhone 4 for about a month now. i have the 32GB black version and i have noticed if i am say for example using a game app, then after about ten minutes the metal band will get really hot. it will only happen to whichever side is facing up, so bottom of band will stay cool (heat rises?) is this normal? oh yeah happens on phone calls too, and surfing, and facetime and everything share your experiences!