WhatsApp's Koum and his new business partner Mark Zuckerberg are key speakers at the Mobile World Congress. With WhatsApp adding voice calling to its service, will the Facebook boss outline a new ... more 
WhatsApp's Koum and his new business partner Mark Zuckerberg are key speakers at the Mobile World Congress. With WhatsApp adding voice calling to its service, will the Facebook boss outline a new vision for a mobile strategy? Ivor Bennett reports on the headline news from Barcelona. less 
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Mon, Feb 24, 2014 3:33 PM EST