The line cannot receive messages. If you want to open it, the message will come down.

There should be something wrong with the settings. You need to open them.

Try to switch the line of scientific internet access. If you can't receive the text message, it may also be a line problem. Try to switch different lines, and you can choose to switch Japan-Korea lines.

Or the GoolePlay service of Android phone is not given permission, and all permissions need to be turned on in the settings.