Once I received a text message from my classmate, and when I read it again, the text message was actually different, just the content he sent. What happened?

Maybe it's a system problem. It's normal. After all, too many people use it. How can there be no mistakes?

In addition, China Mobile and China Unicom are not a system, and there are more problems between them. You are not on the same network, are you? So don't worry, as long as it doesn't happen often!