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Oi (Portuguese for "Hi"), which used to be known as Telemar, is the largest landline telephone company in Brazil and the second biggest in Latin America, behind Mexican AmÃ©rica MÃ³vil. Initially, Telemar was allowed to offer only local voice and data services and interstate long distance voice services. Today, Telemar and its subsidiaries offer local, long distance and international voice and data services, besides a growing mobile phone network. Currently, Oi has 22.2 million land lines in service, 31.7 million wireless customers, and more than 4 million ADSL subscribers (2009).