Receiving SMS: How can my mobile phone receive the same SMS twice?

When the other party sends a short message, you will receive multiple messages, because the short messages are reserved by the base station in your sector. When you turn on your mobile phone, or the mobile phone information channel allows reception, the information will be sent to your mobile phone, and the mobile phone will also send back a signal to the base station. If an information report is set on the other party's mobile phone, this signal will be fed back to the other party's mobile phone to form an information report. If you receive it, but the signal is not sent or blocked due to network, mobile phone, SIM card, etc., and the base station thinks that you have not received it, it will also detect the status of your mobile phone and send it to you again if allowed. This will continue during the service stay. So you will receive many similar messages. I will reread the SIM card. According to the above reasons, it should be related to mobile phones, networks and SIM cards. You can use the elimination method to confirm which problem it is. Change your phone, SIM, or try somewhere else. If it is a smart machine, please pay attention to software and antivirus.