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 | Your message is in a secure queue being reviewed for compliance. This is a routine security check to prevent spam and phishing. | Most approvals are completed within 1 to 3 minutes. Please refresh your dashboard. If your message has been stuck for an unusually long time, it may require manual review by our team. Note that the approval process cannot be bypassed, even for scheduled messages. |
6 | CancelledAfterReview | – | Your message was stopped by our compliance team before reaching the network. This is usually due to missing opt-out instructions (e.g., "Reply STOP"), unapproved short links, or prohibited content. | We always send an email explaining the exact reason for the cancellation. Please check your inbox and spam/junk folders. Once you identify the issue, update your message content and create a new campaign. Cancelled campaigns cannot be edited or resent directly. |
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. |