Free Dialer tune:
SMS - UL to 5800000(tollfree)
Change Dialer Tone:
SMS - DT FIND to 5300003(tollfree).
Change Tone option does not seems to be working for all users. Only a few set of people reported it as a working hack. Anyway, It's worth giving a try.
Don't be afraid to call. They are Fully Toll Free. Most probably, this trick will get activated within 24 hours. Aircel Hackers are gonna release More and More hacks for You Subscribers.
You can also try this updated trick which works for one month :
Step 1 : Activation: SMS UL to 5300003 you need to activate the aircel hellotune service, soon after step 1 go to step 2.
Step 2 : Deactivation: UNSUB to 5300003, deactivate the hellotune service immediately, inorder to use free hellotune ringtones on aircel.
This trick will not work more days as aircel might remove it or disable the hack. but keep commenting and sharing tricks with us.
UPDATE : You can also try this method as well, Activate a plan of 7/- Rs . Just keep the balance less than 1 Rs on the 6th day and thats it. you can enjoy unlimited free caller tunes on aircel.
NOTE : Here is a quick tutorial on how to select songs as hellotune. visit aircel.com from your computer or mobile, slect the VAS menu and search the required song under the dialer tones