RCS Setup for ISVs: Why You’ll Need 10DLC or Toll-Free from Day One

RCS Business Messaging is gaining traction as a richer, more interactive channel for customer communication.

For ISVs, enabling RCS is an exciting step—but it’s also a shift in how messaging needs to be supported behind the scenes.

If you’ve already explored RCS for Business registration, compliance, and fallback, the next step is understanding what operationally comes with offering it to your customers.

RCS Works Alongside SMS and MMS

RCS isn’t a standalone channel, and it’s not going to replace SMS. 

While adoption continues to grow, a meaningful portion of end-user devices and carrier networks still rely on SMS or MMS. In practice, that means a significant percentage of messages—often around half, depending on your audience—will be delivered via fallback.

So when you launch RCS for customers, you’re not replacing your existing messaging setup. Rather, you’re expanding it.

Fallback Is Part of the Core Setup

To support that expansion, ISVs need to have fallback channels fully in place from day one.

That includes:

• 10DLC or Toll-Free numbers provisioned
• Brand and Campaign registration completed (for 10DLC)
• Toll-Free verification where applicable
• Messaging flows that can dynamically route between RCS and fallback channels

These fallback paths ensure that every message reaches the end user, regardless of device or carrier support.

Compliance and Deliverability Still Matter

Messages that fall back to SMS or MMS follow the same rules as any other A2P traffic.

That means your fallback numbers need to be:

• Properly registered
• Aligned with approved use cases (no drift content) 
• Configured for carrier throughput and filtering requirements

In other words, RCS builds on the same compliance and deliverability foundation you’ve already established with 10DLC or Toll-Free.

Provider Selection Becomes More Strategic

Because RCS and fallback are tightly connected, choosing a provider isn’t just about RCS capabilities.

It’s about finding a partner that can support:

• RCS delivery and onboarding
• 10DLC and/or Toll-Free infrastructure
• Registration and compliance guidance
• Throughput management across all message types

Providers like Telgorithm are designed with this full ecosystem in mind—supporting both the RCS layer and the underlying channels that make reliable delivery possible.

A Unified Messaging Approach

At its core, offering RCS is about delivering a better customer experience without sacrificing reach or reliability.

That requires a unified approach:

• RCS for enhanced engagement
• SMS and MMS for universal coverage
• Infrastructure that connects it all seamlessly

For ISVs, the expectation isn’t complexity, it’s coordination.

And when that coordination is handled well, RCS becomes a natural extension of your messaging strategy, not a separate system to manage.

Join the waitlist for early access to Telgorithm’s RCS Business Messaging beta.