this device is not registered as part of the iphone developer program.

Register your copy through your developer number.

you have if you downloaded beta software and you're not a registered developer.

If you are not an authorized developer or beta tester then you have screwed up your iPhone.

You can try putting it into recovery mode and Restoring it.

Apparently your phone has become bricked. I found this on MacRumors: "Find a developer that is willing to add your UDID and it will be unbricked."

Also, try deggie's advice. Put the phone into recovery mode and restore it.

You're hosed. That's what you get for attempting to bootleg software. Officially, there is no way to back down from the iOS 5 beta. You can either pay the $99 to join the developers program and register your device or wait for iOS 5 to be released.

guys im registered developer i just bought it

but i dont know how to register my device could any one tell me how?

If you are a paid up developer then ask on the confidential dev forums. You get access as a paid up dev.

I've read that you have to restore from iTunes, downloading iOS5 from here : http://osxdaily.com/2011/10/12/ios-5-download-available/

I'am trying it...

I am part of the apple dev program and have been so since about July this year. I have been using iOS5 beta 7 all fine until last night when now it wants me to reactivate but fails with the error message: "The device is not registered as part of the iPhone Developer program. ##br####br## If you are a registered member of the program, please register you device at apple.com.... blah blah blah..." But my UDID (or whatever it is called) is registered and it has been working for about 5 months now.

So why don't you install the FINAL RELEASE. It's been out there for over a week now...

Hi, can someone conform on reinstall with the GM or Final Release IOS5?

I experienced the same thing.

I have an active developers account from when I was dabbling with making an app a couple of months ago, and my dev account is still active. I installed the ios5 b7 release, and then when the final release came out I updated my phone as soon as it was released. As far as I am aware my phone is (was) running the final public version of ios5.

Today I was boarding a plane to fly from Sydney Australia to Toronto Canada for a family funeral and as I did a last minute email check before takeoff the phone just turned itself off without warning and restarted itself, asking for activation over either wifi or iTunes, and showed the errr message mentioned above. Being out of wifi range, I couldn't do anything at the time. I connected to iTunes upon arrival in Vancouver, but still had the same error. Phone refused to backup, and it told me that I was already running the latest version of the os.

I have since gone to the apple dev site, logged in and registered my phone. No difference.

Eventually, looking through the thread here, it doesn't seem like there is much I can do, since the backup of the phone is on my computer back in Sydney and I need my phone to function for the next few days here in Canada. I ended up restoring the phone completely, after saving all my photos to iPhoto. I know I'll lose a bunch of other stuff, and have to waste a lot of time reinstalling apps, etc. Thank goodness all my calendars and contacts and mail are stored on Google's servers.

As far as I can tell I did all the updates as I should have, i had a fully registered and legal phone connected to a fully registered and legal dev account. This should not ave happened and I'm a little ****** off that it did.

I'd be very interested to hear how many other people had this problem, and whether Apple has anything to add. (I won't hold my breath waiting for that)

Chris

Similiar problem here with an iPad2. I had yesterday off from work. I turned on iPad2 to catch up with work mail and I had this error. In my case I plan to swing by work and connect to my iTunes and see if that fixes. My iPad is registered and I just checked. It is the first device I registeres at iOS Provisioning portal.