Why doesn't Apple's mobile phone display the primary and secondary cards?

Apple information does not display the primary and secondary cards because users have sent messages to each other before, and they will use the mobile phone card used for texting before by default. After deleting SMS and sending new SMS, users will have a primary card and a secondary card to choose from.

After the upgrade of Apple's mobile phone, 1 1 has no secondary card, which is caused by the damage of the dual-card connection file or the connection failure during the system update and upgrade. If file damage or system failure occurs during the system upgrade, you can download the system installation package again to upgrade the system.

Apple does not display primary and secondary numbers when sending text messages. In the process of using Apple mobile phone, you can set the primary and secondary number labels in the cellular network interface of the mobile phone.

The dual card of Apple's mobile phone needs to be set in "Cellular Mobile Data" to display the "primary card" and "secondary card". Material/tool: iPhoneXsMax. The specific operation includes the following steps: Open "Settings" on the mobile phone desktop. Open "Settings", find "Cellular Mobile Network" and click "Enter".