Every iPhone, iPod, iPad & ATV has a 40 character long Unique Identifier (UDiD) made up of numbers and letters that are specific to that one device.
Beta versions of iOS will only activate if the device running it has its UDiD registered on a Registered Developers Account. Therefore if you want to try the cool new features of iOS 8 we need your UDiD. The sooner we get your UDiD the sooner you can install iOS 8.
Do not use iOS applications to find your UDID! Only iTunes or profile checking can get your right UDID!
1. Connect your iPhone to your computer, open iTunes and under "DEVICES" on your iPhone.
2. Select the Summary tab and click on the word "Serial". This will replace the serial number with the UDiD.
3. Right click the UDiD and you will be give the option to copy unique identifier. Paste with Control-V (windows) or Command-V (mac) into the bar above your chosen payment processor.