Decade -1 The Indian Telecom industry witnessed a sluggish growth (CAGR of 10 per cent) in the state owned era corresponding to the period 1981–90.

Decade - II The foundation of growth of this sector was laid with the introduction of reforms in 1992 mainly in the form of increased competition due to opening up of the sector to private players. This facilitated easy market access for telecom equipment and for offering telecom services to the Indian consumers at affordable prices. As a result, telephone subscriptions grew at a CAGR of 20 per cent during 1991–2000.

Decade - III The industry grew at a CAGR of 35.3 per cent during the period 2001–11. Total telephone subscribers in India increased from 28.53 million in March 2000 to 943.49 million in February 2012.21 Wireless subscriptions increased from 1.88 million in March 2000 to 911.17 million in February 2012 and wireline
subscriptions increased from 26.65 million.

The Following chart shows 30 Year Growth Rate of the Indian Telecom - Wirelines + Wireless (Mobile / Cellular) Telephony Services