4010: RCS capability check unavailable
The RCS capability check could not run on the sender line.
HTTP status: 503.
The RCS capability check could not run on the sender line. This is an HTTP 503 error indicating a fault on the sender line, not a statement about the recipient.
Troubleshooting
Section titled “Troubleshooting”- Retry the request after 30 seconds.
- If it persists, send from a different line on your account and contact support.