Mahanagar Telephone Nigam Limited (MTNL) provides fixed-line and other basic telecommunications services in Delhi and Mumbai. As of March 31, 2012, the Company�s fixed-line telecommunications networks in Delhi and Mumbai had an aggregate of approximately 3.46 million fixed lines in service. As of March 31, 2012, it had approximately 5.59 million subscribers of its cellular services using global system for mobile communications or global system for mobile communications (GSM) technology in Delhi and Mumbai. As of March 31, 2012, it had approximately 0.25 million limited mobile subscribers in Mumbai and Delhi. As of March 31, 2012, it had approximately 1.04 million subscribers for broadband in Mumbai and Delhi and approximately 8.99 million Internet access subscribers. The Company derives its revenue from local, domestic long distance and international calls that originate from its network.