Basically, how does the process work if your getting an upgrade after you've walked out the store ? Do you HAVE to sync the iPhone with a computer in order to complete the process. Or do you get the phone, do all the business in store, and then walk out and the process will work in the background automaticallly to transfer numbers and things. Reason I ask is that if i get the phone, its quite likely, i'll not be able to get it to a PC for at least a week ... would I be able to use it ? or would it just be locked until I synced it with my home PC?