How to send messages with a secondary card on iphone?

Take iPhone 1 1 and IOS 13 systems as examples:

1. Open the SMS for iphone and click Create New SMS. You can enter the mobile phone number of the recipient, or click the+sign at the back to select the recipient from the address book.

2. Before editing the text message, the default SMS card number will pop up. Click the default card number, and the minor number and the major number will pop up at the bottom of the screen to switch. If you want to send information with a secondary card, just select the secondary card number.

If you used the secondary card to send a text message before, but the other party replied to your primary card, you will be prompted that "the number has been changed to the primary number". At this point, if you reply directly, it will become a main card message. If you want to send a message with a different card, you need to delete the previous message. If you don't want to delete the previous SMS, you need to use the card-fetching pin and take out the main card before sending SMS with the secondary card.

Precautions:

1. The primary card and secondary card in the dual-card of Apple mobile phone can be switched at will.

2. Card number switching is only applicable to single SMS sending.