WhatsApp voice calling feature Photo Leaked the second time.

WhatsApp voice calling feature has been in the works for quiet some time now. A leaked screenshot of the feature is suggesting that the launch of voice calling is getting closer. As per the
screenshots, it looks like there would be separate screens for dialing a voice call to WhatsApp contacts, call logs and ongoing calls. The call logs, dialer and the contacts screen is separate
from the main chat window which also combines recording and playback. A separate screenshot of the feature shows a conversation window that displays on received and missed call icons.


Also, WhatsApp may add call mute, switch to text message, and hanging
up option as well. This voice-calling feature is still under the development stage and might rollout in the first quarter of 2015. Earlier in November 2014 a different website revealed a
couple of icons and screenshots of the voice call function.
"The voice calling feature had been delayed till Q1 of 2015 due to some technical difficulties" said by WhatsApp CEO, Jan Koum in October 2014.