iTunes will back up the iPhone before syncing so if it happens again, then I can just Restore from that backup - great thought! I think the first time you sync there are some options about merging vs. other actions. It seems like merging is the correct option. I may have elected something else last time. I now backup my pst files in Outlook regularly so it won't be an issue for me now. I just don't want to foul up my friend's phone!! Thanks,