iOS 8 GM (Gold Master) build is likely the final build that Apple will release to public next week, and it doesn’t require any UDID being registered.
What’s New In iOS 8 GM:
-Interactive Notifications
Up till iOS 7, the only way to interact with notifications is by tapping on the notification itself, which will in turn launch the app and then you can go about your business. But iOS 8 takes things up a notch, by introducing interactive notifications. Simply swiping left or down on the notification will let you reply to a text message, tweet etc. No need to launch the whole app itself.
-Frequent Contacts in Multitasking View
Double tapping the Home button will take you to the multitasking view. But wait, there’s more. Instead of getting a glance of the apps that are running in the background, iOS 8 now lets you go through contacts on your iOS device which you frequently interact with.
-QuickType keyboard
This is a change which many users have been crying for since the inception of iOS. QuickType now shows you suggestions for words as you’re typing right above the keyboard in a small bar. It also supports predictive suggestions, and will, as you guessed it, guess words as you’re typing a sentence. And over time, it will learn your typing habits and will throw you suggestions based on your actions and how you type.