Hey guys just a quick question. I am going to pre-order the iPhone 4s in the morning. I currently have the iPhone 4 and my wife has a iPhone 3GS and I am going to give her my iPhone 4. I am guessing I will need to restore the iPhone 4 back to factory settings and sync with her iTunes account along with switching her sim card from the 3GS to the iPhone 4. Is this all I need to do?