Yes I understand the difference between the two. Ive been a die hard Mac geek for 18 years(hell I even tattood the apple logo on me 15 years ago and was in Mac-addict magazine.. Lol. Yes a big nerd). There was mention in the posts that I upgraded the phone and no issues and that the transfer complete returned once I changed phones.I'm not talking about iOS which is the operating system that can be found on a 3GS iPhone or current generation iPod. I'm specifically talking about the iPhone. The other threads didn't appear to be talking about the hardware, just the iOS.