I am not a developer, even so I have the ipsw. I also have windows, and as I told you, 3utools gives an authorization error from apple to install the update, and itunes tells me that I need a newer version, which does not exist today. I suppose that those of you who are developers will have all the necessary tools to install it, but what we are not, today there is no way to update with ipsw in a traditional way. I guess that until the public beta comes out, apple will not start signing ios 16 to install it in a traditional way.