Rua do Lavradio, 71
Rio de Janeiro, RJ
Oi S.A. provides integrated telecommunication services for residential, corporate, and SME customers in Brazil and internationally. The company offers fixed telephony services, including local and long distance, network usage interconnection, and public telephone services; mobile telecommunications services; voice and data transmission services; and pay TV services. It also provides multimedia and IT services; data traffic services; financial services; investment and receivables portfolio management services; business consulting and management services; and payment and credit systems. In addition, the company invests in properties; purchases and sells real estate; and publishes telephone directories and operates related databases. The company was formerly known as Brasil Telecom S.A. and changed its name to Oi S.A. in February 2012. Oi S.A. was founded in 1963 and is headquartered in Rio de Janeiro, Brazil. On June 20, 2016, Oi S.A. along with its subsidiaries filed for bankruptcy protection.