My first iPhone was the 4, then I upgraded to 4S for the improved antenna and camera. I also bought the 5, this time without contract since I wasn't upgrade-eligible, simply for LTE and the larger screen. I don't think I will upgrade to 5S as my phone has LTE, great camera, etc. unless they again increase the screen size. In fact, if iPhone 6 is not released with major innovations to iOS and a larger screen, I will be checking out the Windows and Android options the next time around. And I say that as a complete Apple fan and owner of MBA, iPad, Apple TV, Time Capsule, etc., etc. I've sold each previous model for top dollar via local Craigslist.