DLT Registration Step-by-Step Guide (India): Entity ID, Header, Template and API Wiring
If you send commercial SMS to Indian mobile numbers, DLT registration comes first. There is no workaround and no legitimate gateway can send unregistered commercial traffic.
SMSGatewayCenter published a complete, operator-agnostic walkthrough covering registration AND the integration layer most guides skip.
What the guide covers:
Register as Principal Entity (get Entity ID)
Register Header / Sender ID (6-character alphanumeric)
Register Consent and Content Templates (get Template ID per message)
Wire approved IDs into SMS API calls
Critical concepts explained:
PE-TM binding chain (why technically correct API calls still fail)
Service Implicit vs Service Explicit vs Promotional vs Transactional
Variable placeholder rules ({#var#}) and common rejection causes
Pre-send template validation API
Why API "success" does not mean operator delivery
Multi-operator registration (Airtel, Jio, VI, BSNL)
Common mistakes that cost weeks
Includes working cURL, PHP, Node.js, Python, and Java examples for Send SMS with dltEntityId and dltTemplateId.
Read the full guide: https://www.smsgatewaycenter.com/blog/dlt-registration-step-by-step-guide-india/













