Today itunes alerted me to latest upgrade which I think is the ios4? I have a 3G phone. Started the upgrade, went for 3 hours, needed to go out so unplugged phone - disaster! Phone wiped. Have plugged phone back in to "Restore" (to factory settings) has been going now for 2 hours, the dialogue box says "Restoring Iphone software" but status bar is not moving - how long can I expect this to take? Thanks to any advice.