DLT registration is mandatory by TRAI.

SMS is digital Media information and a marketing tool. SMS service is categorized as marketing, information and OTP SMS.SMS that are used for marketing purpose are commonly known as promotional SMS. SMS that are used to communicate the client’s information on payment, account login details are known as Informational SMS. SMS that are used for activation of account or password reset an OTP mode of SMS is used. SMS can send with SENDER ID or number or dynamic number as per guideline of country specific mandates