I got T24 Sim from Big Bazaar after a Purchase before 5 Years Back freely.The benefit of this sim was I get talktime whenever I purchased at Big Bazaar.I loved a lot of using this sim.I went to Munnar and Kodikkanal Hill station before a week, and I have Reliance, Idea and T24 sim with me, but the amazing fact is I get signal only to my T24 sim, it helped a lot to find location through Gps.
And also Recharges are also affordable for Normal Family.I normally using 21 Rupees, I get 100 Mb for 3 Days validity.And also am satisfied with that.
I strongly recommend you all to go through this and feel the difference.