RCS Fallback Messages

RCS Fallback MessagesCopy Anchor Link

Never lose a message again — RCS messages now automatically fall back to SMS or MMS when a recipient's device doesn't support RCS.

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RCS fallback messages

Include a fallback object in your RCS send request with a from phone number and text or mediaUrls. If RCS delivery fails, the message is resent as SMS or MMS automatically.

• SMS fallback when only text is provided (≤3072 characters)
• MMS fallback when mediaUrls are included or text exceeds 3072 characters
• Original RCS message status updates to FALLBACK_SENT
• Webhook delivers fallbackMessage details so you can track both legs

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