What if I use my sim to restore a different iPhone?
I have my 3GS back up on my iTunes, but I'm about to sell my old 3G to a friend of mine. He wants to unlock it, so since it's currently on the "connect to iTunes" screen, I figured I would pop my sim card in it, "set up as new" on the iTunes so that it doesn't sync any of my information, and then leave it to where the default icons are on the homescreen for him.
So my question is, will that erase the back up I have on iTunes of my 3GS? and what about when I put my sim back in my 3GS and plug that into iTunes, will it erase what's on my 3GS and "set up as new" because it recognizes the sim? Just kinda wondering what steps to take before I actually do this.
Thanks in advance.