Telcomm. Regulatory Authority of India (Govt. of India) TRAI complete regulation (click here to download TRAI TCCCPR 2018 regulation) has introduced DLT process for sending SMS in India. All Enterprise and Telemarketer have to register their business, headers (sender IDs), content templates, and consent templates on any of the DLT platforms. You can register under any of the operators like JIO, Airtel, Videocon, Vodafone, BSNL, MTNL etc.
All steps in the DLT registration process must be completed to send SMS.