Brazil Approves Rules for 4G Wireless Airwaves Auction

BusinessWeek 

Brazil's five largest carriers -- Telefonica Brasil SA (VIVT4), Tim Participacoes SA (TIMP3), America Movil SAB, Oi SA (OIBR4) and NII Holdings Inc. (NIHD) (NIHD) -- will be the biggest participants in the auction, said Jose Otero, an analyst at ...