What each model of the iPhone added to the game

iPhone 4 (2010): Eye candy The iPhone 4 focused on looks — and how! It’s a shame our first encounter with it was the infamous lost-in-a-bar unit, because the 4 really was an incredible jump in both quality of design and technology. It would have been exciting to have it revealed with Jobs’s showmanship. At any rate, the most lasting improvement was, of course, the Retina screen. I certainly