---
title: How does Service Implicit SMS differ from Transactional SMS?
description: "Service Implicit SMS send updates based on existing relationships (e.g., \"Bill due soon -SMSGAT\"), while Transactional SMS focus on critical actions like OTPs. Both are 24/7 and DND-exempt, but their intent varies. Learn more at [smsgatewaycenter.com/service-implicit-sms/](https://www.smsgatewaycenter.com/service-implicit-sms/) and [smsgatewaycenter.com/sms-types/](https://www.smsgatewaycenter.com/sms-types/). ### More…"
url: "https://www.smsgatewaycenter.com/blog/kb/how-does-service-implicit-sms-differ-from-transactional-sms/"
updated: "2025-02-25"
category: Bulk SMS / DLT
---

# How does Service Implicit SMS differ from Transactional SMS?

Service Implicit SMS send updates based on existing relationships (e.g., "Bill due soon -SMSGAT"), while Transactional SMS focus on critical actions like OTPs. Both are 24/7 and DND-exempt, but their intent varies. Learn more at [smsgatewaycenter.com/service-implicit-sms/](https://www.smsgatewaycenter.com/service-implicit-sms/) and [smsgatewaycenter.com/sms-types/](https://www.smsgatewaycenter.com/sms-types/).

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