India telephone system: domestic - local and long distance service provided throughout all regions of the country, with services primarily concentrated in the urban areas; steady improvement is taking place with the recent admission of private and private-public investors, but combined fixed and mobile telephone density remains low at about 20 for each 100 persons nationwide and much lower for persons in rural areas; fastest growth is in cellular service with modest growth in fixed lines; international - a number of major international submarine cable systems; country calling code - 91.