a friend has an iphone 4 that has yet to be set up with a computer/itunes. He wants to restore the data of the phone. I plugged it in to a computer and I was asked to either start a new phone or back up from another phone that HAS been connected to the computer before. If I set the phone up as a new phone, would I lose all data, on the phone? What's the best way to restore a phone that has not been associated with itunes yet?