That is NOT what this is about. Wifi Calling is a feature that (if your carrier supports it) will switch incoming and outgoing calls to wifi when your cell signal is poor and wifi is connected.

You are absolutely wrong about many other things here, but I am not going to spend time on that.

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store