United States Cellular Corp was incorporated under the laws of the state of Delaware in 1983. The Company is a wireless telecommunications service provider. It operates in one segment: wireless operations, and its wireless operating markets are in the United States. U.S. Cellular's ownership interests in wireless licenses include both consolidated and investment interests in licenses covering portions of 30 states and a total population of 58 million at December 31, 2013. The Company provides services in two categories: Wireless Services and Wireless Devices. In Wireless Services, the Company's postpaid customers are able to choose from a variety of plans with voice messaging and data usage options and pricing that are designed to fit different customer needs, usage patterns and budgets. In 2013 the Company began offering Shared Data plans that include unlimited voice minutes and text messaging combined with a variety of data usage options. The Company also offers prepaid service plans, which include voice, messaging and data options for a monthly fee. As of December 31, 2013 the Company's 4G LTE network covers 87% of its postpaid customers. The Company offers a comprehensive range of wireless devices such as handsets, modems, mobile hotspots, home phone and tablets for use by its customers. The Company offers wireless devices that are compatible with some or all of its 4G LTE, 3G and 2G networks. The Company sells wireless devices to agents and other third-party distributors for resale. The Company purchases wireless devices and accessory products from a number of manufacturers, including Apple, Samsung, Motorola, Personal Communications Devices, LG, BlackBerry, Superior Communications, Kyocera, ZTE, Tessco, ABM Wireless (Mobilistics), and Xentris Wireless. The Company's marketing plan is focused on acquiring, retaining and growing customer relationships by offering products and services built around customer needs at fair prices, maintaining an exceptional wireless network, and providing customer service. The Company currently operates four regional customer care centers with personnel who are responsible for customer service activities, and a national financial services center with personnel who perform credit and other customer payment activities. It also contracts with third parties that provide additional customer care and financial services support. The Overage Protection service provides customers peace-of-mind by sending them text message alerts when they come close to reaching their allowable monthly plan minutes, text messages or data usage in order to avoid overage charges. The Company's distribution program consists of retail sales and service centers, direct sales, third-party national retailers and independent agents, plus the website and telesales for customers who wish to contact the Company through the Internet or by phone. The Company's products are provided by Wal-Mart and Sam's Club at select retail locations. Further, Amazon offers the Company's prepaid service on-line. The Company also markets wireless service through resellers. The Company's competitors include Verizon Wireless, AT&T Mobility, Sprint, and T-Mobile USA., among others. The Company's operations are subject to FCC and state regulations.