A sign indicating a free WiFi zone logo sits on the window of an exhibitor hall at the Mobile World Congress in Barcelona, Spain, on Wednesday, Feb. 27, 2013. The Mobile World Congress, where 1,500 exhibitors converge to discuss the future of wireless communication, is a global showcase for the mobile technology industry and runs from Feb. 25 through Feb. 28. Photographer: Simon Dawson/Bloomberg via Getty Images
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