I am trying for the life of me to find the picture of the new iPhone plastic back shell. I am unable to locate it, but I had a thought based on what I remember of the shell. The interior dimensions of the new iPhone may actually be the same thickness or even thinner as compared to the Gen 1. I think the thicker exterior of the phone (width, height, depth) are due to the plastic back only and not the need to incorporate the new chip(s). With the metal, it allowed Apple to place a thinner shell around it, but with plastic, Apple would have the iPhone feeling like a milk jug if they didn't thicken her up. Thoughts... EDIT: I found it courtesy of iLounge.