TIM is a Brazilian holding company that provides telecommunication services through its subsidiaries TIM Celular and Intelig Telecomunicações. It services include mobile, fixed and long distance telephony as well as data transmission services, primarily using GSM, 3G and 4G technologies across the country. TIM Brasil, a subsidiary of Telecom Italia Group, started operations in 1998 and is based in Rio de Janeiro. In the 4G segment, the operator offers this technology in over 740 towns and cities across Brazil. It currently has over 63 million subscribers in the mobile telephony segment.