OK so the system is now live. You should get a pop up asking if you'd like to update the carrier settings. Click Yes
Then you go back to your watch app and 'setup cellular' is active. I was able to get all the way to the 911 address screen but for some reason the 'continue' button is greyed out even when I enter my full address. So not sure what's going on with that. But I was able to get like 2 steps from the finish lol
I went into the watch app on the phone and went to cellular and went from there. In 30 minutes I was done and left the phone behind and went for a job, was heaven. I guess I was lucky from the sounds of things.