The most used phone in the USA is the Apple iPhone.
While Samsung is the leading Android brand, Apple's iPhone holds the majority of the U.S. mobile phone market share. Other brands like Google, Motorola, and Xiaomi have a considerably smaller presence. This dominance reflects strong brand loyalty, effective marketing, and a comprehensive ecosystem of products and services associated with Apple.
In summary, Apple's iPhone remains the top choice for mobile phone users in the United States.