Do Not Disturb (DND 3.0) App enables smart phone users to register their mobile number under DND to avoid Unsolicited Commercial Communication (UCC)/ Telemarketing Calls / SMS. This is based on TRAI, “Telecom Commercial Communication Customer Preference Regulations, 2018”. TRAI’s UCC Regulations, Amendments can be seen at: http://www.trai.gov.in/telecom/consumer-initiatives/unsolicited-commercial-communication. The App helps you: 1. Set your DND preferences. 2. Lodge a UCC complaint with your