Joke Collection Website - Blessing messages - Why can't my iPhone 1 1 send messages with a primary number and a secondary number?

Why can't my iPhone 1 1 send messages with a primary number and a secondary number?

1. First open the settings on the home page, then find "Cellular Network" in the settings, and then click on it.

2. Then in the cellular network, open the settings of two cards, and click two cards respectively, as shown in the figure below.

3. Click the data flow card at this time, then open this card and click "Enable this number".

4. After the two cards are enabled, enter the SMS page. Find the place pointed by the arrow, and then click the green box.

Click on the green box, and you will find that you can change the card you use. Choosing a secondary card here means sending text messages with a secondary card. After clicking, you can see that another card is used.