Indeed, though it seems there are folks out there who still won’t use WhatsApp or WiFi calling at home. That being said, if there’s no internet at the customers home or they don’t have a great mobile signal or a phone that isn’t compatible, then they can’t.
Nothing however to stop someone from going to a public place with free WiFi and leeching off it to make free calls via WhatsApp. That’s what millions of hotel guests around the world on holiday or business trips do.
