The Economist covers the boom in Indian mobile market:

bq. Some 5m new users have signed up since March; there are now over 17m subscribers. Add to this around 3.5m subscribers to a “limited” mobile service provided by fixed-line operators that works within a restricted area, usually a large city, and the total is even more impressive. What is driving this spectacular growth? Affordability. Limited mobile providers, authorised to begin operations early this year, cross-subsidise mobile from their fixed-line services. This has led to such fierce price competition that Indian mobile telephony is now the cheapest in the world. [TriNetre - The Third Eye]