United States Cellular Corporation provides wireless telecommunications services in the United States. The company offers wireless services, including voice, messaging, and data services. It also provides wireless devices, such as handsets, tablets, mobile hotspots, home phones, and routers, as well as accessories; sells wireless devices to agents and other third-party distributors for resale; and offers option to purchase devices and accessories under instalment contracts. In addition, the company offers roaming, wireless eligible telecommunications carrier, and wireless tower rental services. It serves customers with 5.0 million connections in 21 states, including consumer, business, and government customers. The company provides its products and services through retail sales, direct sales, third-party national retailers, and independent agents, as well as ecommerce and telesales. The company was incorporated in 1983 and is headquartered in Chicago, Illinois. United States Cellular Corporation is a subsidiary of Telephone and Data Systems, Inc.