This guide will help you to troubleshoot any SMS error statuses you may see. Each error code includes a description, possible causes and steps you can take to resolve the issue.
# | Status | Status Code | Description | What to Do |
1 | Sent | 200 | Message sent to the network for delivery | No action required unless further updates don’t appear. |
2 | Sent | 201 | Message delivered to the handset | No action required. |
3 | Queued | 200 | Message is queued for delivery | No action needed. If delays persist, check network connection or contact support. |
4 | Scheduled | 200 | Message is scheduled for delivery | No action needed until scheduled time has passed. |
5 | WaitApproval | 200 | Message is waiting manual approval from ClickSend staff | Allow time for approval. Contact support if status does not update after some time. |
6 | CancelledAfterReview | – | The message was canceled by ClickSend staff as its content did not comply with guidelines | If you believe your message was incorrectly flagged, contact ClickSend Support for clarification. |
7 | Cancelled | 301 | Message is cancelled | Verify why the message was cancelled. Attempt to resend or contact support if needed. |
8 | Failed | 301 | Unknown failure | Retry sending. If problem persists, contact support for investigation. |
9 | Failed | 301 | Unknown subscriber; number is inactive or invalid | Confirm phone number is correct and active. |
10 | Failed | 301 | Unidentified subscriber; invalid number or network routing issue | Ensure recipient number is valid. Contact support if errors continue. |
11 | Failed | 301 | Illegal subscriber; rejection due to failed authentication or filtering | Verify recipient network compatibility with SMS. Contact support if needed. |
12 | Failed | 301 | Rejection due to subscription, handset, or network not supporting SMS | Verify recipient’s network supports SMS services. Contact recipient for confirmation. |
13 | Failed | 301 | Absent subscriber; phone out of range or off for 12+ hours | Retry sending later. Error typically clears once recipient’s device is back online. |
14 | Failed | 301 | Memory capacity exceeded; recipient’s device lacks space for SMS | Contact recipient to free up space on device, then retry. |
15 | Failed | 301 | Rejected due to network congestion or error | Retry the message in a few minutes. Contact support if issue persists. |
16 | Failed | 301 | Rejected by the recipient network | Reach out to support. There may be network restrictions affecting delivery. |
17 | Failed | 300 | Temporary network error; ClickSend will retry automatically | Wait for retry. No action necessary unless error repeats. |
18 | Failed | 301 | Network timeout when delivering message | Retry the message. Contact support if persistent timeouts occur. |
19 | Failed | 301 | Network routing error | Verify recipient number and retry. Contact support if issue continues. |
20 | Failed | 301 | Anti-spam rejection by recipient network | Ensure message complies with anti-spam guidelines. Modify and retry. |
21 | Failed | 301 | Message delivery receipt expired | Retry message. If problem repeats, contact support for assistance. |