Does not report information mean that information has not been sent?

Generally speaking, if you send a message and set up an information report, you can get a feedback. If you don't receive it, it is likely that the other party didn't receive it, or the network is delayed. An operator is like a short message relay station. Only through the operator's server can your short message be sent correctly and the feedback information (information report) be received correctly.

That is, there may be something wrong with the operator's server .. If there is, you can complain.