OK, I've just realised the error of of my ways with a public beta. I made the foolish assumption that when the official release of iOS9 came out, I could switch across from my public beta and job done. Clearly not the case. I had 9.1 on my old phone, with an iTunes backup when I bought my new 6S. I am now discovering that I cannot simply restore my new 6S from my backup of 9.1 on my 6. Is there a workaround? Id rather not install the public beta on the new phone as it makes most sense to move over to the proper iOS 9.0.1 release now. Any ideas?