I have an iPad 3, and an iPhone 4. with iOS 6 just coming out, and me upgrading to an iPhone 5 on Friday when it’s delivered, I decided to upgrade everything to iOS 6 before the rest of the world bombards Apple’s servers with downloads. iPad upgrade worked flawlessly, my iPhone upgrade did not. Thankfully, I have iCloud set to back up the phone every night, except for my pictures. I have a feeling I just lost all my shit, as it’s restoring right now.
Don’t make the same mistake I did by trusting that the iOS upgrade process will work flawlessly.