Iphone primary and secondary card settings

In order to meet the needs of work, many people have bought an iphone that can hold the primary and secondary cards. How to set the primary and secondary cards of iPhone?

Iphone primary and secondary card settings 1. Click Cellular Network in the phone settings menu.

2. Click the phone number you want to set.

3. Click on the phone number label.

4. Select the major number or minor number label.

This paper takes iPhone 12 as an example and applies it to ios 15 system.