I've upgraded my phone to Oreo Beta from 7.1.1 - I had Wifi Calling enabled during the upgrade - so it's still active, but I don't see any option to turn it off/on in the settings now??
I have done this - just wondering if I've missed something,.
Surprised no-one knew this - even Nokia??
I found it under the phone app - three dots at the top, settings, Calls, Wifi-Calling.
NOT Obvious to find.
What do you see?
yes - so then go to settings, calls,
Possibly - EE (UK) support it.
See video below where I show how I do it: