I use my mobile phone to send messages to others. Why does someone always get two identical messages before and after, and there is only 1 in my outbox?

One of the reasons may be the delay of the mobile operator server, just like the network delay! This means that when you send a text message to a friend's mobile phone, you must first go to the server of the mobile operator and then forward it to the friend's mobile phone! However, it may be that the high utilization rate of the server at that time will lead to the server not receiving the feedback information sent back by your friend's mobile phone, so the server will send another one to your friend's mobile phone!

The second reason is that there is something wrong with the backward tilt function of your mobile phone. The short message was sent successfully but no information was received from the server. Your mobile phone can send it again!

The second reason, and the biggest possibility, is that your mobile phone system itself has loopholes or contains virus files!