Brasil Telecom, Brazil – www.brasiltelecom.com.br
Quote from Wikipedia:
Brasil Telecom S.A. (BrT) is a major Brazilian telecommunications company headquartered in the Brazilian capital of Brasilia. The company is one of three land lines, one long distance and eight mobile telephone companies in Brazil that emerged from the break-up of Telebrás. Originally the company was called Tele Centro Sul, because its service covered the states in the central and southern parts of Brasil, namely Acre, Rondônia, Goiás, Tocantins, Mato Grosso, Mato Grosso do Sul, Paraná, Santa Catarina and Rio Grande do Sul, as well as the Distrito Federal. Since January 9, 2009, the company is a subsidiary of Oi.