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
Spent a third day on technical support trying to activate. No dice although the people were very friendly and helpful. Complete failure to activate and just WS300 even after a full reset of my cellular line. It was escalated to a 3rd level with a call back timeline of up to 7 DAYS! Wow. Somebody really messed up this launch if they are now telling their customers that they will see what can be done in a week. It must be very frustrating for these people on the front lines of tech support trying to sort this out for people and not being able to really do anything.