>> (as someone who doesn't use an iphone or whatsapp) What's the purpose of this? Surely if you want to call a phone number you want to make a phone call?
Outside of major cities in the US, mobile coverage can become spotty. However, most people have Wifi, so I almost always use WhatsApp Audio or Facetime Audio at home for this reason (when the other party supports it.)
While still making you pay for it. Also, they often prevent foreign IPs from connecting (to juice those extortionate roaming fees), so this wouldn't work abroad.
Outside of major cities in the US, mobile coverage can become spotty. However, most people have Wifi, so I almost always use WhatsApp Audio or Facetime Audio at home for this reason (when the other party supports it.)