WhatsApp new version 4.0.0 with calling feature WhatsApp is free, but the data connection does come at a cost? Should you really use you internet for calling or still stick on to voice calling from your network carrier? We check out the last feature that WhatsApp added some time back for its users. Our primary concern about the voice calling option was of quality. We made few calls around, of course from our office Wi-Fi connection to ensure signal strength. Out of five calls, three calls were perfect. Crystal clear audio quality with hardly any disturbance was our first verdict.…