Why does the mobile phone display no SMS center when sending SMS?

The reason is that there is no central number. Without this number, you can't send messages and settings.

The setting method is as follows:

. Open the settings of SMS.

Find the information center in SMS settings.

When you open it, you will see the number of your own information center. If it's not a string of numbers of +86, it's also one of the reasons why sending short messages failed.

The key step is to enter the center number in the Number column of the information center, and then click OK.

If you don't know the center number, you can call the local operator to provide the center number.