Telephone & Data Systems (OTCMKTS: TDSNA) is a diversified telecommunications holding company headquartered in Chicago, Illinois. Founded in 1969, TDS has built a multi‐faceted business model centered on wireless and wireline communications. The company operates through two principal segments: U.S. Cellular, a mid‐tier wireless carrier offering voice, data and messaging services, and TDS Telecom, which provides broadband, voice, cable television and managed IT services to residential and business customers.
U.S. Cellular serves a predominantly rural and suburban customer base across multiple regions of the United States, focusing on network reliability and localized customer service. Its offerings include 4G LTE and evolving 5G capabilities, as well as value-added services such as mobile device protection plans and digital content. TDS Telecom delivers high-speed internet, digital voice and advanced networking solutions—ranging from fiber and DSL connections to fixed wireless broadband—in more than twenty states, often filling coverage gaps left by larger providers.
Over its history, Telephone & Data Systems has emphasized community engagement, investing in infrastructure to support underserved areas and participating in digital inclusion initiatives. The company was founded by LeRoy T. Carlson, Sr., and remains under the leadership of his son, LeRoy T. Carlson, Jr., who serves as Chief Executive Officer. TDS continues to pursue strategic investments aimed at expanding its network footprint, enhancing service offerings and maintaining a customer-focused approach in competitive telecommunications markets.
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