Is there a 4G network in America now?

This is inevitable. As the mainstream mobile network standard in the world at present, there are many technical patents for the commonly used international 4G network, all of which were put forward by American high-tech companies headed by Qualcomm. Huawei once had competition, but its strength was not as strong as it is now, which led to its failure to successfully compete for standards (unlike 5G). Then the technical standards put forward by the United States will have corresponding practical applications, but it is estimated that it is the same as China, except that the network signals in urban and rural areas are different and the services provided by operators are different.