United States Cellular Corp is a regional wireless carrier that serves about 4.4 million customers spread across four major geographic clusters: the Midwest, mid-Atlantic, New England, and the Pacific Northwest. These service territories encompass a total population of about 32 million people. The vast majority of the markets the firm serves are rural or second/third-tier cities, with only the greater Milwaukee and Oklahoma City regions boasting populations greater than 1 million. us Cellular also owns a 5.5% stake in Verizon Wireless' Los Angeles operations and, unlike its wireless carrier peers, owns most of its towers. The firm has agreed to sell its wireless operations and most of its spectrum licenses in a series of transactions with T-Mobile, Verizon, and AT&T.