Bulk SMS Plans is introducing MTNL ERROR CODES for bulk SMS which helps to better clarity of sms failed that to be delivered. These MTNL ERROR CODES will help you to understand the reason for failure and troubleshoot issues.
MTNL ERROR CODES
| Error_Code | Description |
| 0 | Successfully Delivered |
| 1 | Unknown subscriber |
| 2 | Service temporary not available |
| 3 | Unexpected Data Value |
| 4 | FWD SM Failure(It is the case, when no response received from operator) |
| 5 | Unidentified Subscriber |
| 6 | Absent Subscriber (Absent Subscriber SM) |
| 8 | No Response of SM Delivery Success / Failure status |
| 9 | Illegal MS |
| 10 | System failure (Network timeout) |
| 11 | Teleservices Not Provisioned |
| 12 | Illegal MS (Illegal Equipment) |
| 13 | Call barred (Operator barring) |
| 15 | SM Delivery fail (Subscriber busy for MT SMS) |
| 21 | Facility Not Supported |
| 23 | System failure (unknown error code) |
| 24 | System failure (unknown error code) |
| 27 | Absent Subscriber |
| 29 | System failure (No subscriber reply) |
| 31 | System failure |
| 34 | System failure |
| 36 | Unexpected Data Value |
| 99 | Memory capacity exceeded |
| 100 | PLMN system failure |
| 101 | HLR system failure |
| 102 | VLR system failure |
| 103 | PVLR system failure |
| 104 | Controlling MSC system failure |
| 951 | Number Blacklisted |
| 952 | DND Rejected |
| 953 | Invalid Senderid |
| 954 | Invalid Number |
| 434 | Insufficient Balance |
| 956 | 9p.m to 9a.m |
| 436 | Duplicate Number within 30 Min |
| 437 | Inactive Account |
| 438 | Account Expired |
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