Official Google Blog: SMS on orkut
while in Brazil you can use it with Carlo services but Google didn't seems to be specific about any particular service operator in India.
i have an Aircel connection (Nagaland) and i tried to use this application but it didn't work as i am not able to receive verification code, though i did try to resend the code but didn't work
i am not able to send messages to friends outside orkut.
so, i deleted the application from my profile after waiting for half an hour,
Just when i deleted app from my profile, i got message from MyCantos with the verification code.
so, i suggest you people to have passion.