I had that issue all week(just got the phone Monday) after several hours(and a couple of days) on the phone with customer service, about 2 pm today when I tried to access wifi calling, it asked for my address, typed that in and now it works. I mentioned that to them Tuesday that I could not access the 911 address when I called, they didn't care, told me someone would call me back in 48 hours, which they did not. But hey, it just started working!
Thank goodness I did not order this phone months ago! For it not to work that long, I would have ported over to metro after the first week! I had already called them to see if they had the phone I wanted at metro and was on the way out the door when wifi calling started working. Just imagine you live in Arizona and order a brand new car with air-condition, only to find out after you get it, the AC does not work, and they tell you it will be days before someone contacts you, and it just happens to be 110° for the next 2 weeks! Oh yea, they sold you something you HAVE TO HAVE, but do they care it does not work? Sad, all businesses are becoming that way!