So I tried out the option to enable WiFI calling ON OTHER DEVICES - on my new T-Mo line. I then Turned OFF Wifi calling on my iPhone but Left the option ON for "other" devices. Then I turned my iPhone off.
Then I went to my iPad mini (connected to my Wifi) and made a call - WOW!!
I do not even need to carry my iphone around any more so long as I am connected to Wifi.
If I can do this with the Apple Watch I am going to buy it because WiFi calling is seriously awesome.
