Oi SA is a Brazil-based company engaged in the operation of switched fixed-line telephony services (STFC) concessions. The Company is active in the provision of STFC as a local and intraregional long-distance carrier. The Company's segments include Residential Services, focused on the sale of fixed telephony services, including voice services, data communication services (broadband) and pay television (TV); Personal Mobility, focused on the sale of mobile telephony services to subscription and prepaid customers, and mobile broadband customers, and SMEs/Corporate, which includes corporate solutions offered to its small, medium-sized and large corporate customers. The Company operates in Region II of the General Concession Plan (PGO), which covers the Brazilian states of Acre, Rondonia, Mato Grosso, Mato Grosso do Sul, Tocantins, Goias, Parana, Santa Catarina and Rio Grande do Sul, and the Federal District. The Company also provides domestic and international long-distance services.