iOS 9 was released just a few minutes ago by the Apple company and to the surprise of many, the version made available by the American company is different from the one offered to developers a week ago.
More specifically, iOS 9GM it has build 13A340, while the final version of iOS 9 has build 13A344, that is, four iterations newer than the one released a week ago, but for now no one knows what changes it brings for users.
We probably won't know soon what changes Apple made in iOS 9 final compared to iOS 9 GM, but if you have the GM version, then you can do Software Update, Software Update to the final version.
