Check the specific status reason in your Message List Dashboard. Here's what different reasons mean:

My message failed, but no status reason is present. 

Bird will always provide, in a standardized way, all available information regarding your message failures. If none is available, it is because our downstream carrier didn’t share them. To help us troubleshoot this, collect multiple message samples and share these samples with our support team via ticket.

What does "Unknown Subscriber" mean?

This indicates that the recipient's number doesn't exist or is not linked to active subscriber. You should remove it from your database. For detailed troubleshooting steps, visit our SMS Delivery Status Documentation.

What causes an "Unavailable Subscriber or Network Error"?

The recipient's device may be turned off or out of network coverage. For network errors, the carrier is likely addressing the issue. Try resending later. Our SMS Delivery Status Documentation provides additional troubleshooting tips.

What does "Capacity Limit Reached or Carrier Rejected" mean?

This typically indicates that your SMS may not comply with carrier or country restrictions. Review the regulations of your target country, check your registration status, or submit a new registration at our Registered Originators Dashboard.