TRAI on 5 Dec 2011 released the Indian Telecom Subscription data as of September 2011.

Highlights:

The total telecom subscriber base (Wireless + Wire line) in India now stands at 906.93 Million.
The Overall Tele-density now stands 75.48%
India reaches 873.61 million mobile subscribers
The total Wireless Tele-density now stands 72.70%
7.9 Million Subscribers added in September 2011
Uninor is the biggest gainer among all service providers (added1.92 Million)
Growth of mobile subscribers is tapering off. What used to an average of around 15 million subscribers month on month is now averaging nearly half.
Out of 7.90 million total mobile subscriber base added – 5.58 million were from urban, while 2.32 mobile subscribers came from rural areas.
Idea seems to be the biggest gainer from MNP requests – Since last 3 months they have had more subscriber additions than the big 3 mobile operators – Bharti, Reliance & Vodafone.
Mobile Number Portability requests increased from 180.59 lacs subscribers at the end of August 2011 to 206.29 lacs subscribers at the end of September 2011.
In the month of September, 2011 alone 25.70 lacs request has been made for MNP.
Broadband subscription reached 12.84 Million in September-2011 from 12.69 Million in August-2011