Airtel gives Swatch bharath tunes as hellotunes for 30 days. Now i explaining , how to make any song as hellotune free by using this trick. First Make your balance 1rs. And follow steps 1. Dial 5432112 then select your language. 2. Now you can hear 3 Swatch bharath tunes. Activate any on of them. Then you will get a confirmation message of activation Now you have Swatch bharath hellotune. 3. Dial 578785 4. Now Select your languange and Activate any song. 5. After activating a song . You will get the confirmation message from airtel. it will shows hellotune for 1 day for 0 Rs. But don't worry its free for 1 month. Note: Make ur balance below 1 rs and deactivate it after 1 month and do the same process as given above.