TIM, which is 67%-owned by Telecom Italia, is the third largest wireless carrier in Brazil, with 63 million subscribers, equal to about 24% of the market. The firm also owns 49% of I-Systems, an infrastructure partnership that is expandingits network footprint across Brazil. I-Systems can provide broadband service to about 9 million locations, equal to a bit less than 15% of the country. TIM leases capacity on the venture's network to serve retail broadband customers under the UltraFibra brand. TIM also resells fiber network access from other providers, including Oi's former infrastructure business V.tal, which passes about 22 million customer locations.