I update my iphone 5 to ios 7 and now all i get is an apple logo?

I update my iphone 5 to ios 7 for free and after like one hour right now all i get is an apple logo then a black screen does it repeatedly and i tried doing the home and lock screen thing didn't work, i connected my iphone to my itunes and it said i had to passcode and i had to enter it, i do have a passcode but as i said all i get is a freakin black screen and an apple logo, Please Help Please.

Its only beta so if any issues I would wipe your phone back to factory.

Have you registered your device's UDID? If not, you won't be able to activate iOS 7. I used http://www.instantudid.com/ and they registered mine instantly for $5.