Apple 1 1 How to switch SMS cards?

Apple 1 1 Switch SMS cards as follows:

1. Step 1: Click the information in the mobile phone to enter the information management interface.

Step 2: Then create a new message and enter the text you want to send.

3. Step 3: Next, click the bottom of the screen and select the primary number or secondary number to send.

4. Step 4: Final delivery is successful.