Which iPhone are you using and how long do you plan on hanging on to it? Are you happy with the specs, OS, camera, storage options .etc and finally, do you plan on upgrading to the 5S providing its just a spec bump like the 3GS and 4S. I personally chose a different device for my next phone. But the was my personal choice. I still really like iOS and have a few iOS devices to keep a foot in the door at the apple camp but I decided I want something different for a phone.