All the messages I sent arrived in the outbox, but it didn't show that the messages had been sent. I checked the number of the SMS information center, that's right.

Okay, I'm sorry I misread the question earlier.

First of all, if the short message sent by this machine reaches the outbox, it means that the information has been successfully sent to the center. So don't worry about the local SMS center.

If there is no problem for the other party to receive the short message you sent, then if you need to display the sending report, just turn on the short message setting.

If the other party can't receive your message, it is recommended to change the sim card and try again. If it is normal after replacement, check the original sim card. If the problem remains, check the mobile phone (put the original card in other mobile phones to check whether it is available) ~

In addition, you can try to restore the factory settings.