Are you a registered developer or did you update to the Public Beta version?? If not, how did you get the 9.1 Beta IPSW for 6S/6S+? AFTDL or IMZDL don't have them yet.
Users were able to install developer beta versions on their 6/6+ phones without registering their UUID with Apple. I am wondering if this is true for 6S/6S+ too. I know about the public beta. But, my question is specifically regarding the developer beta.