Jan Koum, Co-founder and CEO of WhatsApp, speaks during a Keynote conference as part of the first day of the Mobile World Congress at the Fira Gran Via complex in Barcelona, Spain on February 24, 2014. The annual Mobile World Congress hosts some of the world's largest communication companies, the show runs from the 24 to 27 February. Photo by Manuel Blondeau/AOP.Press/Corbis (Photo by AOP.Press/Corbis via Getty Images)
