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DND  DND website : https://trai.gov.in/portals-apps/trai-apps How to Make Complaint Through APP:  DND Play Store:  https://play.google.com/store/apps/details?id=trai.gov.in.dnd&hl=en-gb How to Make Complaint Through SMS:  The person may make a complaint to the service provider through voice call or SMS to toll free short code 1909 or through DND App within 3 days of receipt of such UCC. For registering the complaint through SMS, the subscriber should forward the SMS to 1909 in the following format: The UCC, XXXXXXXXX, dd/mm/yy where XXXXXXXXXX is the telephone number or header of the UCC.