How to go back to my 6.1.3 software?

I made a dumb decision and tried to follow a video on youtube on how to get the free beta download for iOS 7 and i followed what the video said and now my phone says "We're unable to complete your activation. This device is not registered as the iphone developer program." And now i don't know how to go back to my iOS 6.1.3 software. I can't reset my phone or anything, it doesn't give me an option when i plug my phone into iTunes.

You need to reset your iPhone to factory default settings here is a link with how to do it.

Once its done you can re sync it with iTunes to get all your stuff back.

Download 6.1.3 firmware from http://www.idownloadblog.com/download/

Once it has downloaded, go into iTunes and Shift+Click on 'Restore iPhone… ', Select the 6.1.3 firmware you downloaded and your phone should restore back to iOS 6.

Hi. We have the same case. Did you try their suggestion?

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