How can I get my UDID being stuck at the *activation error* screen

iOS 7 is in Beta. No support can be provided for it here.

Enjoy your paperweight.

So you stole Apple's software and then had the nerve to come to an Apple site asking for help? Unbelievable.

Seriously? You've got to be kidding...

Press and hold the home screen button, then plug your phone into your computer via usb, DO NOT LET GO OF HOME screen until the itunes symbol has appeared on your phone, Fianlly restore from your computer

Another way is through OS X’s System Information app: click the apple icon in your menubar → About This Mac → More Info… → System Report… Once you have the System Information app open, look for USB under “Hardware”, and then look for your phone in the USB device tree, and note that the UDID is actually reported as the “Serial Number” here. (I’m pretty sure this method won’t work (at least on OS X) if iTunes doesn’t recognize your phone.)

Source: http://hypertext.net/2013/06/find-iphone-udid/

The folder name where iTunes puts your device backup is the same as your UDID.

Thank you Alex, you saved my bacon after I foolishly tried to upgrade a new device before registering its UDID in the developer portal.

Not to jack this thread, but I am a registered developer with Apple and current. I have registered my iPad's UDID with the iOS Dev Center however iTunes and my iPad are giving me the activation error screen. I am attempting to install beta 6. Any thoughts?

Post in the Dev forum.

Chirostar wrote:

Not to jack this thread, but I am a registered developer with Apple and current.

So you'd like Apple to revoke your dev status for posting in the public forums and violating your NDA...

Didn't mean to ruffle feathers here, posted in the dev forums.

Thank you Felipe.

If you read the Dev NDA...you should know where to post. No one here can help you, so double posting won't help.

thanks man, you solved my issue 🙂

Thank you so much!!!!! that completly saved me!!! i am forever grateful!!!

I have installed IOS 7 on iPAD now IT IS NOT BETA - iTunes whows only it's seriqal number - not UDID. All old applications for iPad showing UDID shows different results, because this function is stoped in IOS 7. I want to add myiPad devicesz list in app developer program, but I can not find iPad's UDID. There were no problems in IOS 5 and ISO 6. Everything had changed when IOS 7 appeared.