Had my iPhone 4S for a couple of weeks so far and my one concern was battery life but now I realize that the battery icon is visually inaccurate. I just bought a Battery Boost application that puts the battery as a number within the application which gives me a better understanding of the battery situation. I'll keep you all posted. I also bought a battery case that has a 1500mah battery in it but this may be something I use rarely since it adds a little bulk to my pocket.