How do the primary and secondary cards on iphone 1 1 switch short messages?

1. Select Settings Options Settings and click Settings in the main interface to enter, as shown in the figure below.

2. Click cellular mobile network in the setting interface, as shown in the figure below.

3. To enter the cellular mobile network, you need to set three main options, as shown in the figure below.

4. Click Cellular Mobile Data Entry to set which card to use for data, as shown in the figure below.

5, and then refers to the default voice number, you can choose the main card, as shown in the figure below.

6. Finally, click the cellular phone number tab to set your dual-card label at any time, which can be customized, as shown in the figure below.