IOS 7 Beta Screen Frozen URGENT?

I currently have the iOS 7 Beta 2 for iPhone 5. But something happened and now my screen is frozen on the Lock Screen and I have a passcode. Well actually its the "touch" part of the screen because the time and battery does change. All the buttons do work, but siri doesnt work. And my battery is at 100%. I'm afraid to downgrade to iOS 6 because I'm afraid that the screen will still be frozen. Would it still be frozen? What should I do? Please Help ME!

Is your device's UDID registered? A lot of people have been reporting problems like this when they install iOS 7 without registering their device's UDID with a developer account through a site like's $5, and I haven't had any problems with my 4S on iOS 7.