If you think about it... that's exactly what they do. There are always 3 iPhones on the market at any one time... good, better, best.Right now it's the iPhone 4, iPhone 4S and iPhone 5. It just so happens that they are the 2010, 2011 and 2012 models. This year's "better" iPhone was last year's "best" iPhone. Apple didn't have to create another model to fill that midrange spot... they just kept iPhone 4S in production. It's a good way to down on costs.