WARNING: DO NOT UPGRADE TO IOS 6 WITHOUT UDID REGISTERED
I updated my phone to iOS 6 without having my UDID registered, and this is the result!
MAKE SURE YOU GET YOUR CONFORMATION EMAIL BEFORE UPDATING!
You can watch how to update correctly to iOS 6 at - http://www.youtube.com/watch?v=odU4zCgQmmE&list=UUWsBxeY4cFO2BtOC-IpnIGw&index=2&feature=plcp