When I first got my iPhone, I synced it with my friend's laptop. After that I downloaded a lot of apps and put in all my contacts. Now I'm ready to sync it with my computer, but will it also delete all my applications, photos, and contacts? I had my iTunes check for purchases a while back to get the stuff I downloaded, but now when I try it, it doesn't retrieve the new apps(including some I payed for) anymore. I want to sync it now but want to know EXACTLY what won't get deleted.