Well changed my mind. With the rumored demise of ATT microcells by the end of the year, I will need another phone with WiFi calling or I will have to move my mom to Project Fi and get another phone for Fi.
I’m going to go by the store and look at Xr. May order one and give my mom my 6plus. Her phone supports WiFi calling, but as usual, in its infinite greedy wisdom, ATT doesn’t allow WiFi calling on most non branded phones.