1.) First deact call me tunes if u activated by sending CT sms
2.) Than dial 543211999 for 1 month subscription .
3.) Select one from given 2 songs.
4.) After confirmation sms if u want to change SONG dial *678*020# OR *678*030# and than reply with # for main menu.
5.) Select song that u want. .and enjoy free ct.
NOTE- FOR changing Song ur balance should be not greater than 10 rs .
Also to be on safe side try all this in low balance.
Balance is not deducting if it is deducted than call 121 and complain about it.
They won't have any detail of this activation there, So they will refund ur amount. Enjoyyy!!!