tata mobile to tata mobile

hi there…i recently came 2 knw from my friend that outgoing from tata mobile to tata mobile is free for 2 yrs. Is it true?? and is there any specific mobile dat v have to buy to avail this offer? And do v have to recharge it for validity…??? pls answer my queries as soon as possible…i am only interested in free outgoing, so pls tell me abt it…