How to active Whatsapp voice call

Whatsapp, the best messenger application for android phone and iPhone. Recently WhatsApp unveiled voice calls facility for both android and iPhone. Sometimes it's very hard to active call function in WhatsApp messenger, because they comes without pre-activated version. Don't worry we you want to actions WhatsApp call in phone. I'm now gonna posting a helpful trick for you to easily active WhatsApp call. If any of your contact has activated WhatsApp call, then request them to call you. Or if you see missed call from any number, then just press call back buttons to active latest feature of WhatsApp, voice calls. Just add this number to your phone contact, +8801710771195 and send a message for call back. We will call you soon to active WhatsApp voice call in your phone.