I haven't been as up to speed on iPhones the past couple of years so I'm hoping someone can answer a couple of basic questions. I have a 2 year old Verizon iPhone 4. I find that the home button is sticking quite a bit and as this is my primary camera it's often a bit too grainy for me. Upgrade Questions 1) Should I find a similar camera experience on the 4S and the 5 and is the diference between the 4 and the 4S/5 noticeable enough if it's a main reason of upgrading? 2) I know I would lose my unlimited data plan with the 5 but is that also true if I upgrade from the 4 to the 4S? 3) Can anyone point to any killer features that will only work on the 5 that I would miss out on or any that would work substantially better on the 5? Thanks so much!