The two largest operators in the United States are:

1. VerizonVerizon is the largest wired communications and voice communications provider in the United States, and is also the largest wireless communications provider in the United States, covering Nearly 90% of the population of the United States has approximately 421 million users. Verizon also provides bundled services: voice services, data services, and yellow pages. It doesn't seem to be an exaggeration to describe Verizon's strength as "there are only things that customers don't want for the time being, and there are no services that the company cannot provide."

2.AT&TAT&T - the abbreviation of American Telephone & Telegraph, meaning American Telephone and Telegraph Company, the largest local and long-distance telephone company in the United States, and the second largest mobile operator in the United States. AT&T is the earliest cooperative operator of iPhone and has a large number of iPhone users. AT&T's network standard is GSM, and mobile phones use SIM cards. AT&T provides fiber optic TV, home broadband, landline and mobile phone bundled services. Many long-term users in the United States have used this multi-service bundled package. The advantage is that the more services bundled, the greater the discount. In total, the entire life usage fee is cheaper than paying individually.