WhatsApp has this facility(WhatsApp calling) but blocked till today Morning.
UAE people can now make calls using WhatsApp within country and abroad
We tested calling on WhatsApp and it worked on both, WiFi connection and mobile data.
It is a VoIP service. It’s limited for one minute after that call could be disconnected.
we don’t know how long it will work.
How to make a WhatsApp call
To do a WhatsApp call, simply open the chat with the person you want to speak and tap the phone button on top.