Why does my iPhone not work with ISO 5?

I recently downloaded IOS7 and everything was going great till it was time to set up my phone. I had just gotten past the Wi-Fi part and it pops up and says "This device is not registered as part of the iPhone Developer Program.<br/><br/>If you are a member of the program, please register your device in the iPhone Developer Program Portal at http://developer.apple.com/...om/iphone/.
I really don't feel like paying 100 bucks to become a Developer, so doe sanyone know how to get it back to the IOS6?

No, I think you can't restore now! You need ask someone have developer account add your UDID, it cheaper (5$), you can search in Fiverr
something like this

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