In India, People are happy to see Mobile service provider fighting to get a pie from a large user base by providing new offers every now and then.
Recent addition is call rate tariff cut in Long distance call (STD) to make then Cheapest among other or to just give "Unlimited STD" at not so nominal price. this is how it goes,

"Airtel cuts STD rates, sets off price war"
Airtel started this by announcing that it will slash the STD call rates by around 43 % to Rs 1.50 per minute from Rs 2.65 per minute and the roaming charges by 43 % to Re 1 per minute from Rs 1. 75 per minute across all tariff plans with effect from April 30 this year.
"Idea Too joins to race..!!"
Idea Cellular Ltd, a major cellular services operator, joins the race by launching a new tariff regime that seeks to cut rental by 23 per cent to Rs 269 a month for post-paid users and also removes different rates for calls to cell, WLL (wireless in local loop) and land line. This new tariff, to be introduced from May 11

"Vodafone says, We are happy to cut rate too !!"
Now make STD calls to any mobile or landline phone at Rs 1.30/min. To activate, SMS STD to 56565 (toll free). No monthly rental required.

"Tata Indicom"
I have not heard any news for same !! have you !!
"Reliance Mobile - Dhiru bhai, oh sorry, Anil Bhaiiii !!"
They always outsmart others by doing things, others cant think of !!
here is an example. To address price cut war started by Airtel, Anil has put a trump card that put reliance in win win condition, that's Unlimited STD Calling card !!
Which allows unlimited local and STD calls between Reliance to Reliance mobiles. To avail this scheme, Prepaid customers will have to pay Rs. 496/validity and Postpaid customers will have to pay Rs. 440/month.
Got that !! stupid, 500/- rupees, to avail the unlimited calling. it's not free !! Very Smart..

"BSNL Mobile, Hummm.. what can i say !!!"
Rumours are there but yet no confirmation from BSNL.