Why did the other party only receive a text message once?

The retransmission of short messages may be the problem of the sender or the receiver. Short message center is used to send, receive and charge short messages. Check the bill and see how many expenses there were at that time. If it is charged according to multiple items, the problem lies in the sending process. It is likely that the mobile phone did not receive the response message correctly after the short message was successfully sent to the short message center. Then the mobile phone will handle it according to the unsuccessful sending of the short message and send it repeatedly. In this way, in the short message center's view, if a mobile phone sends multiple short messages, it will be charged according to multiple short messages. If billing is by bill, the problem is that it is easier to be received, that is, after the mobile phone receives the short message, the returned confirmation message is not received by the short message center, which causes the short message center to resend it to the receiver's mobile phone. According to the SMS center, the sender only sent one SMS, so he will only open a SMS bill. According to the description in the question, many students have appeared, not limited to a certain person or a certain mobile phone. The problem is likely to appear in the signal quality of the local operator's base station or the software bug of the switch.

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