How to make and receive calls using WhatsApp on a Windows 10 Mobile

[Windows Central]

Use WhatsApp to place calls to friends and family anywhere in the world for free when you're connected to Wi-Fi
Travelling is great! You see new sites, meet new people, eat mysterious foods, but sometimes it's nice to hear a familiar voice. WhatsApp let's you place calls to friends and family no matter what they are. No time for a full on chat? No problem. You can also send someone a quick voice note they can listen to at their leisure.

Full story from the WindowsCentral blog...