How to Start BSNL DND (Do Not Disturb) Service through Voice Call?
BSNL (Bharat Sanchar Nigam Limited) network provides you a voice call option to register in DND and avoid unwanted telemarketing calls and messages, by dialling the toll free number 1909.
Dial 1909 and opt for an option,
1.Through Customer Care Executive
2.Through IVRS (Interactive Voice Response System)