According to TechCrunch, WhatsApp CEO Jan Koum announced the upcoming feature at Mobile World Congress earlier today.
With this new functionality, the app will even more directly compete with the likes of Skype, KakaoTalk, Line, and Viber. Though, without video support, it still won't be an all-encompassing solution just yet.
Voice calls will be different from the voice messaging that WhatsApp already offers. The latter feature essentially functions as an audio text message, not anything remotely resembling a live conversation.
Wait, what's the difference what the voice messaging feature now?
the voice note, you record and then send, the person can chose wheter to listen to it or nawT, and then send another voice note back
the new feature: you can call the person and talk in real time, but instead of using your coins, you'll call via internet/wifi/3g/4g
He better invest with those millions and better his app. He also should make it free, Mark already basically paid for whatever expense we free users are.
Whats the need? 
wat an upgrade so excited 
He also should make it free, Mark already basically paid for whatever expense we free users are. 