Free Hello Tune Trick on Airtel for 25 days

Hi friends, today one of my friends said about a method to activate free hellotune in Airtel Its a simple method and anyone can try it free.You can set your favourite hellotune free for 25days. To activate this call to 578789,listen to IVR it will ask you to record your favourite song by placing your phone near Tv or music system.You can record your favourite song upto 20seconds,after 20sec the call will get disconnected automatically.Now you will recive a confirmation message regarding the activation status of your selected song as your new hellotune.This service is totally free up to 25days from the date of activation. Try it low balance.. Coz it's not tested by me.