⚡Quick answer-
• Promotional = marketing (offers, sales), allowed 10 AM – 9 PM only, never reaches DND numbers, API route = 1.
• Transactional = OTPs, order/booking alerts, other non-marketing info for registered users, delivered 24 × 7 to DND and non-DND numbers, API route = 4.
• Service Implicit = non-OTP, non-marketing service notifications (order status, reminders) to existing customers; behaves like Transactional for timing/DND.
• Service Explicit = marketing-like service messages sent after the customer’s written/OTP consent; if consent is withdrawn, they are treated as Promotional.
When should I use this guide?
Read it any time you upload an SMS template, call the Send-SMS API, or wonder why a message was blocked due to a route or content-type mismatch.
1. Route & content-type definitions
• Used to send offers, discounts, or promotions to existing and new customers.
• Messages may or may not be solicited by recipients.
Transactional
• Used to send OTPs, informational messages, booking/order confirmations, and other notifications to registered customers.
• Not intended for marketing.
Service Implicit
• Informative SMS other than OTP that relate to a product or service the customer already uses—e.g., purchase confirmations, order status, alerts, reminders.
Service Explicit
• SMS sent after receiving customer consent (opt-in) to share service-related promotions or updates.
• If the customer later opts out, these SMS are re-labelled as Promotional.
2. Side-by-side comparison table
*Exactly which numeric route your gateway maps to Service Implicit / Service Explicit depends on operator configuration; contact Support if unclear.
3. When the wrong route blocks your SMS