Ahhh ok... I see what you're saying. The older iPhones (before the iP4) used a regular size Sim card. Well... there's two ways. You can cut the existing Sim card down to where it will fit in the iP4's tray (check out some tutorials on YouTube on how to do this) or you can go to your carrier and they'll have a machine that will trasnfer contacts from a regular Sim to a Mini Sim. I know At&t does this.