In the 1980s and 1990s, Turkey’s telecommunications systems underwent substantial modernization, including nearly complete digitization and advanced intercity trunk lines. In 2004 some 19 million main telephone lines were in use. A satellite system links users in remote areas. The use of cellular telephones has increased rapidly since the late 1990s, reaching more than 50 percent of the population in 2004. In the early 2000s, three private mobile services, the largest with more than 20 million subscribers, were operating. However, in the early 2000s demand has exceeded the supply of Internet and data services.
In 2005 an estimated 10.2 million people were using the Internet. Initial steps for the privatization of Turk Telekom, the state-owned telecommunications monopoly, were taken in 2005. The international dialling code for Turkey is + 90. IDD is widely available. The outgoing international code is: 00. There is an extensive internal telephone network, but often an interpreter will be needed for more remote areas. To phone from PTT telephone booths, which are found in all areas, telephone cards and tokens are used. Local, inter city and international calls can be made from all PTT offices. Mobile phones work across 99.9 % of the country and there are internet cafes in all cities.