I have been using the number "9880916561" for the past 6 years. Since I am receiving the promotional calls and messages at high volumes, I registered for DND (Do Not Disturb) service and I was communicated that it will be activated after the 45 days after the registration. I have also updated few the messages and from whom I am frequently getting, in Airtel website as well. I waited 45 days and even then there was no improvement. Then again I had discussion with Airtel help desk, and then they again said that it can be activated... read full review »