For every SMS you send through the Apifon platform, you will receive a delivery report with the status of the message. Below is a breakdown of what each status means:
1. Refused
The message was rejected by the platform and was not sent.
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No Credits (Account): Your account has no balance.
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Restricted SMS (Anti-SPAM): The message was blocked due to multiple attempts to send the same content to the same recipient in a short period.
2. Undelivered
The message failed to reach the recipient.
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Unknown Subscriber: The mobile number is invalid.
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Missing Parts: The message was split into multiple parts (concatenated SMS), and not all parts were delivered.
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Call Barred: The recipient has blocked incoming SMS messages.
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Rejected by SMSC: The destination number is incorrect or unrecognized by the SMS center.
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Expired: Delivery failed because the retry time limit was exceeded.
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Teleservice Not Provisioned: The recipient's mobile service does not support SMS.
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Handset Error: There is an issue with the recipient’s device.
3. Delivered
The message was successfully delivered to the recipient.
4. Pending
The message has not yet been delivered, but delivery is still being attempted (e.g., the recipient’s phone is off or out of coverage).
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Accepted by SMSC: The message has been received by the message center of the operator, and an attempt has been made to deliver it to the recipient.
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Absent Subscriber: The recipient’s device is off, out of coverage, or affected by roaming restrictions.
5. Uncategorized
The message failed for an unspecified reason—possibly because the recipient was out of network or offline.