Seeking Help How to deactivate BSNL default caller tune 'hindustan bol raha hai'?

[hike]

Hindustan bol raha hai...
This caller tune is good but boaring too everytime I call BSNL user I hear it.
Kindly, guide me about how to deactivate it?
Note : only guide me about deactivation not about how to replace it.

 

[maniotf]

Not sure if this resolved but try 155223 for vas deactivation. Same should work for caller tunes