Apple didn't switch the primary and secondary cards when sending text messages.

Apple does not switch between primary and secondary cards when sending text messages. The solution is as follows:

Open your mobile home page, click Info to enter the information interface, click New to enter the new interface, click Recipient, and enter the recipient number or address book to be added. After adding the recipient, the default mobile phone card name will appear. Click on the mobile phone card, and there will be two card options. Change it to the card you want. If the switch is successful, enter a short message and click Send.

IPhone is a series of mobile phone products with iOS operating system launched by Apple from June 5th to1October 9th, 2007.

As of September 2022, Apple has released 37 mobile phone products; The mute button of iPhone series products is on the left side of the front of the device; Before the iPhone 5, this model used a 30-pin (30-pin) interface, and after the iPhone 5 (inclusive), this product used a Lightning interface.

The Home button is configured for models before iPhone X; After iPhone X (inclusive) (except for the second and third generations of iPhone SE), the physical Home key was cancelled.

IPhone series models have been equipped with Apple silicon self-developed chips since iPhone 4. Touch ID first appeared on iPhone 5s; IPhone 6s and iPhone 6s Plus added 3D Touch touch control on the screen for the first time; Wireless charging first appeared on iPhone8 and iPhone 8 Plus models, and Qi(Chee) wireless charging standard was adopted.

On May 25, 2022, Apple reminded developers that from June 30, 2022, all applications supporting account creation should have the function of deleting accounts, and all personal data related to accounts should be deleted.