Free Caller Tune For Airtel Users Just Follow Below Steps :
1) First Your Sim Balance Must below 1rs.
2) Now Call On This Number 543211860
3) choose your favorite song.
4) They will say 36 Rs. for 30 days. Don't fear just choose and conform your song you will receive conformation message like your callertune was activated for one day.
5) Now your caller tune was fully activated.
6) Next day you will get message your caller tune was cancelled due to insufficient balance. But actually your caller tune does not cancelled.. yeah !! This perfectly working.
NOTE :
Suppose if your caller tune was cancelled then reactivate it after that you will not get any caller tune related messages.
Enjoy