United States Cellular Corporation, also known as U.S. Cellular, is a super-regional wireless company that serves more than 6.2 million customers in 148 markets in 25 states. With revenues of more than $3.7 billion, U.S. Cellular maintains one of the industry's highest quality network coverage and comprehensive range of wireless products and services. Founded in 1983, U.S. Cellular and its more than 8,700 associates are focused on customer satisfaction, delivering customer service. The company continues to grow and expand into new markets, introducing service to Oklahoma City; Lincoln, Neb.; Portland, Maine; and St. Louis. U.S. Cellular operates 500 retail locations nationwide and has more than 1,800 agent partners. The company has converted its network to CDMA-1X digital technology, adding more voice capacity, high-speed data products, and features and expanded coverage areas. U.S. Cellular maintains a location in Marion, Iowa.