Who This Is For / When to Use
This update applies to all Kyrios users who send SMS or MMS messages and want immediate clarity when a message fails, without needing to look up technical error codes.
What Changed in Conversations Error Messaging
Kyrios now shows human-readable explanations for SMS and MMS delivery failures directly on the failed message, instead of only displaying numeric error codes.
Each failed message includes:
A clear explanation of why the message failed
The associated error name (when applicable)
A Learn More link to a detailed Help Center article
This change is live across web and mobile apps.
How Error Messages Appear in Conversations
When an SMS or MMS fails to send, the message bubble displays an inline failure indicator with a short explanation. Selecting Learn More opens the related Help Center article for that specific error.
Example: Error 21661 – “From” Number Is Not SMS-Capable
Error 21661 occurs when the sending phone number does not support SMS messaging. Kyrios now explains this directly on the failed message instead of only showing the error code.
What This Means
The phone number used to send the message is not enabled for SMS or MMS.
How to Fix It
Go to Settings → Phone Numbers.
Confirm the selected number supports SMS.
Purchase or assign an SMS-capable number if needed.
Retry sending the message.
What You Need to Do
Nothing. This update is automatically enabled for all accounts and requires no configuration changes.
Why This Update Matters
Eliminates guesswork when messages fail
Reduces time spent searching for error code definitions
Provides direct access to relevant Help Center resources
Improves confidence and speed when resolving delivery issues
Common Questions
Do I still see error codes?
Yes. Error codes still exist, but they are now paired with clear explanations and help links for faster resolution.
Does this work on mobile?
Yes. Plain-language error messages are supported on both desktop and mobile apps.
Are all SMS and MMS errors supported?
All common SMS and MMS delivery errors now display descriptive messages with linked documentation.
Related Articles
Understanding Phone Messaging Status and Error Codes
Forbidden Message Categories for SMS and MMS in the US and Canada
Conversations: Internal Chat
Managing Appointments in Conversations
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