Doctor Glyndwr wrote:
Huh. That’s weird.
Anyway, no, it doesn’t mean that. WiFi calling is a specific feature where, when your phone has a good WiFi signal but poor cellular signal, normal phone calls and SMS messages are magically routed over the WiFi network and so keep working when normally you’d have no signal. It needs to be supported by your network and your phone and the combination of your phone on your network so it’s possible you’ve never seen it. I know it works on Three on my iPhone, as it’s the only way I get calls in work (our office is a massive cellular radio black hole.)
This isn’t anything to do with anything that happens in an app.
Not quite right. It's the phone and the carrier network and the WiFi and the phone on that carrier network using that WiFi.