I have a iPhone 4 with AT&T. I can get a new iPhone 5S from Radio Shack for $60.00 if I trade in my phone. About $100.00 if I don't trade in my phone. To me it's worth the extra $40 to not have to worry about my personal info being stolen. I know I can try to "clean" my phone before trading it in, but I'll never know for certain that I did it right. Plus, with my old phone handy I can transfer my notes, etc. at my leisure. Any advice would be much appreciated.