I have just updated my iphone 5 to IOS7 and it keeps turning down and on?

I've just updated it to IOS 7 beta 2. And it shows a blank white screen and a black apple logo and it keeps turning on and off and i can't stop it Please Help

Ios 7 is in beta and shouldn't be install without a dev account

Ios 7 is not officially released so there will be alot of issues. You should restore back to ios6.1.4 using itunes. Have a good day

This is what can happen when your UDID isn't registered with a developer account. You need to find your UDID and register it at http://www.instantudid.com/.It's $5 and they do it instantly.