Udid
If you have downloaded iOS 5 beta, you must first activate your idevice to run it. Activating firmware means is that you have to get the UDID of your device and get it registered with the iPhone Developer Program before you can start (legally) loading beta firmware on it and you don’t face any problems [...]
How you can find the UDID of your iPhone, iPad and iPod touch for iOS 5 activation. UDID of your device must be registered with the Apple Developer Program before beta firmware installation on it. Because iOS 5 is in beta phase right now, you need to register the device UDID, and here is how [...]
Apple have released iOS 5 beta 2 to download for all registered developers. To download iOS 5 beta 2, you need to be a registered member in the developer program (cost: $99/year) but if you are not a developer, you can still download this release from here. Make sure UDID of your device is activated [...]
If you are not a developer and still want to try iOS 5, then use this tutorial but at your own risk. Here is how to upgrade and activate the iOS 5 firmware without a developer account UDID. This iOS 5 hack was discovered Mert Erdir and exploits a security flaw in the activation screen. [...]
