Hi All, I am trying to send billing SMS to my users, but I get in the Acknowledgement report this NACK/69/Submit failed for all users, any Ideas what happened, I read about the NACK in general and there many reasons for that like:
- The PDU is unrecognised - The PDU is malformed - Invalid Field Length - The PDU data is unexpected and deemed invalid - The PDU is not allowed in the current session state - The ESME or MC is restricting the use of certain PDUs or features How can I determine the reason? note: My operator reject the SMS if the user don't have enough credit. Regards, Hafez
