The SMS API supports these status codes and their descriptions in the responseCode and responseText parameters of the response body.
| Status Code | Status Code Description |
|---|---|
| 0 | SMS sent |
| 1 | Internal error |
| 3 | Empty message |
| 4 | Message text is invalid |
| 5 | Empty sender |
| 6 | Invalid sender |
| 7 | Empty receiver |
| 8 | Invalid receiver |