Tim's Low-Cost Web Surfing Topping Profits

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A woman chats on her mobile phone in the Ipanema neighborhood of Rio... News PhotoAdult,Brazil,Communication,Finance,Horizontal,Ipanema Beach,Latin America,Mobile Phone,Portable Information Device,Residential District,Rio de Janeiro,Talking,Telephone,The Americas,USA,Wireless Technology,WomenPhotographer Collection: Bloomberg 2013 BloombergA woman chats on her mobile phone in the Ipanema neighborhood of Rio de Janeiro, Brazil, on Tuesday, Aug. 6, 2013. Telefonica Brasil SAs Vivo, now controlling 28.7 percent of Brazil's mmobile phone market is locked in a battle with Tim Participacoes SA, whose share of the market has risen to 27.2 percent by undercutting rivals on voice and data plans. Photographer: Lianne Milton/Bloomberg via Getty Images