to activate your jio caller tune You have to type message JT and send to 56789 and then follow the step as you receive the following message. That too free for 30days and you can change caller tunes as much as you want till now without any additional charge.
![IEurosT.jpg](/community/proxy.php?image=http%3A%2F%2Fimgur.com%2FIEurosT.jpg&hash=92db123bd74b525278907c9bc2b9f3e5)