Can American mobile phone cards be opened in Air China's iphone?

American mobile phone cards can open 4g on Air China iphone.

According to Apple's official data, the iphone sold in Chinese mainland and the iPhone sold in the United States are in the same 4g frequency band, so the American mobile phone card can open 4G in Air China's iPhone.

The full name of the United States is the United States of America, which is a federal country composed of Washington, D.C., 50 states, Guam and many other overseas territories.