Update 1: iOS 5 Final version has been released for Download and Jailbreak - Click Here
Just yesterday Apple seeded iOS 5 beta 2 for developers. However, many non-developers get their hands on iOS 5 beta 2 using the various links available around the internet. So how would non-developers activate the UDID of their iPhones specifically? Well, here's a solution for that.
2. Tap “Emergency Call”.
3. Dial 112 (or your local emergency call number) and press the Call button.
4. Now, press Home button.
5. Then tap “Touch to return to call”
6. Press Home button. You should now be seeing the Home screen.
7. Open “Phone” app and End Call.
Video guide embedded below:
Thanks Ali Yousuf