I am registerd to DND service to fully blocked. The registration no is S1038185136 and it got activated and all promo calls and messages were stopped for few days. I have again started getting the promo calls and messages from airtel of which i'm fed up. The 121 customer helpline is just useless. I am being told that the call is been transferred to the CC executive and immediately disconnected. It seems like airtel has gained lot of customers and failing to maintain the quality of service they provided before. read full review »