@Flying_NEB 

Does your mobile operator offer wifi calling?

  @Flying_NEB  to my knowledge yes. It's At&T.  Their website says they do.

Just as a test I pulled it up again. It seems to work. It must have been not able to transfer to wifi to set up when the mobile network was down.  weird. 

  @Flying_NEB AT&T mobile phone network was perhaps down, even when accessing it via Internet.

  @yves_b yes, I'm aware. that's why I was trying to turn my wifi calling on, lol.  But I hadn't set it up before.  It needed the mobile network to set it up, but now it's set up so if there's an issue in the future it should work.