I've been trying to sync my iPhone 3Gs to my laptop. Whenever I connect my iPhone to my laptop and opened the iTunes, it says "Set Up Your iPhone", "This computer has previously synced with an iPhone or another iOS device". And two options were given to me: "Set up as a new phone" and "Restore from the backup of:" It also says the last synced was at 11/06/2010 2:44am. The problem is, I want to upgrade my iOS version from 3.1.3 to iOS 4. I need to backup my iPhone before I can restore it. But I see no options for me to backup. Does anyone facing the same problem as I am? I've been using this laptop to sync my iPhone over the past few years. It has no problems until last few months. I've even tried to reinstall iTunes. Please guide.