Before someone closes this as a duplicate, my question is NOT the same as this Ask Different post.
I've tried everything that the link above described, trying to install the final version of iOS 9 on my iPad that is currently running the iOS 9 Public Beta.
I don't know what I'm doing wrong, as I've deleted the Beta profile in Settings, restarted my iPad again and again, but yet my only option is to install the iOS 9.1 Public Beta, which I don't want to do.
What can do to resolve this?