How does Apple close the sim card?

Take Apple's mobile phone to turn off SIM card usage traffic as an example:

1. Enter the home page of the mobile phone and click the Settings button, as shown in the figure below.

2. Click cellular mobile network in the setup program, as shown in the figure below.

3. After entering the mobile network, click the cellular mobile number of the main card below, as shown in the figure below.

4. After entering the main card number, you can see an activation number, which turns on the switch by default, as shown in the figure below.

5. Turn off the switch behind the number, click OK when prompted, as shown in the figure below.

6. Similarly, you can also set a secondary card, enter the secondary card and turn off the switch that has enabled this card, as shown in the figure below.

7. When prompted, click OK, and the secondary card will be closed separately, as shown in the figure below.