Have you ever thought that why does the WhatsApp logo has a calling button which is actually a messenger? Soon u might erase that thought from your mind since WhatsApp will soon feature the Calling option as well which be inroduced first for the Android and iOS. The Social Networking App which has been acquired by another Social Networking giant Facebook for a whopping $19 billion is on the news daily since the day they acquired. At WhatsApp's MWC press conference, CEO Jan Koum said that some BlackBerry and Nokia phones will be next in line for the voice messaging update, so we can expect this to be launched before the second quarter.Now, you can foresee how much more change the Facebook owned WhatsApp will bring. Also, the change everyone want and are expecting is the Birthday remainder. Hope this thought might reach Zuckerberg and attract more users across the world.