This process of activating do not disturb service is all same for Aircel, Airtel, BSNL, Tata DoCoMo, Idea Cellular, Loop Mobile, MTNL, Reliance Communications, MTS India, Tata Indicom, Uninor, Vodafone and etc.
Fully Blocked Category: Send SMS at START 0 to 1909 or Call at 1909
Key points to remember with DND registration:
1. DND (NCPR) cannot block your bank SMS alerts, bank communications, online bookings, third party personal calling, and etc.
2. It takes minimum 7 days to process your request to stop the unwanted messages.
3. You should have atcleast 3 months of time before applying to new DND request after the previous one.
4. Calls and messages to 1909 is completely toll free, and you don't have to pay anything.