Why can't I get a short message from Lhasa, Sichuan suddenly?

If your mobile phone can receive other people's information normally, then the SMS center should be correct, not your settings. As for whether you can't get a message, you can't get one or all of them. If it's a message, it may be that your message space is full and you didn't receive it, or the message may be delayed. This is normal.

It is also possible to avoid certain keywords by sending text messages. Mobile companies use keywords to block spam messages. Sometimes I can't get it.