Telefonica Brasil, known as Vivo, is the largest wireless carrier in Brazil with 100 million customers, which is equal to about 39% market share. The firm is strongest in the postpaid business, where it has 63 million customers, or about 42% share of this market. Wireless services and equipment contribute about 70% of total revenue. Vivo is the incumbent fixed-line telephone operator in Sao Paulo state and, following the acquisition of GVT, the owner of an extensive fiber network across the country. The firm provides internet access to 6.7 million households on this network. The firm also sells pay-tv and phone services to its fixed-line customers. Finally, corporate data and IT services, including cloud computing support, contribute about 8% of total revenue.