IPhone = locked. No developers code, doesn't connect to itunes. What do i do?

I found some random iOS 7 beta 2 copy on YouTube so being myself I downloaded it and took all of the necessary steps in order to install it. After the completion of the upgrade I went through the proper steps to activating it and then all of a sudden my phone and computer gave me this error message.

"Activation error"
"This device is not registered as part of the iPhone Developer Program. If you are a member of the Program, please register your device in the iPhone Developer Program Portal."

I'm a bit screwed, because of this because my iTunes won't allow me to access the iPhone's information so I can't access the iPhone to restore my backup that I made before. And calling apple about it will not work because my iPhone used to be jail broken along with the fact that the OS wasn't exactly obtained legitimately:/ Please if anyone knows of any way to restore my phone to its original self without those two pleasantries involved, it would be great and I would highly appreciate it!

The problem is that you didn't register your UDID. Here's what you need to do:

- Put your device in recovery mode: http://www.iclarified.com/entry/index.php?enid=367
- Restore to iOS 6
- Register your device's UDID on http://www.instantudid.com/ for $5
- Restore to iOS 7

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