What if Apple 12 doesn't display the primary and secondary numbers when sending text messages?

Apple 12 SMS does not display primary and secondary numbers. You can choose it in the phone settings. The method is as follows:

Preparation materials: Apple 12

1, first enter the desktop open settings,

2. Click Cellular Network on the Settings page.

3. You can see the primary number and secondary number, and then click the primary number on the cellular network page of the mobile phone.

4. Click on the phone number label.

5. Choose to set it as the primary number or secondary number.