Mobile phones can't receive messages from some contacts.

I've had this problem before, and I can't get through to both mobile phone numbers.

You put the card on someone else's mobile phone and see if you can receive it. If you can, you check or reset your mobile phone.

If not, determine whether the other party sends it. If he can send it to others, it is generally no problem.

In addition: operators will not block short messages pointing to a number, either all of them cannot be sent out or all of them cannot be received.