United States Cellular Corporation is an American mobile network operator. Its stock is publicly traded, but Telephone and Data Systems Inc. owns a controlling stake. The company was formed in 1983 and is headquartered in Chicago, Illinois. UScellular is the fifth largest wireless carrier in the United States, with 4.5 million subscribers in 21 states as of June 30, 2024. In May 2024, T-Mobile US announced it would acquire UScellular's wireless business in a deal worth $4.4 billion. Wikipedia