Array Digital Infrastructure Inc owns and operates shared wireless communications infrastructure across the United States through its portfolio of over 4,400 cell towers located from coast to coast; these towers support the deployment of 5G and other advanced wireless technologies for wireless carriers, broadband providers, government agencies and other customers seeking efficient network expansion and cost-effective colocation solutions. The company generates revenue primarily from tower leasing and related services, including ground space rentals, maintenance and engineering support for tenant equipment; it also retains ownership of substantial spectrum assets, such as portions of 600 MHz, 700 MHz, 2.5 GHz, AWS and PCS bands, which complement its infrastructure offerings. Array Digital Infrastructure serves a diverse customer base encompassing major mobile network operators, enterprise clients and public sector entities, with operations spanning 21 states and emphasizing rural and underserved markets; founded in 1983 and headquartered in Chicago Illinois, it operates as an 82%-owned subsidiary of Telephone and Data Systems Inc. Following the completion of its sale of wireless operations and select spectrum assets to T-Mobile US Inc for $4.4 billion on August 1 2025, the company rebranded from United States Cellular Corporation to Array Digital Infrastructure Inc in August 2025 to focus exclusively on its tower and digital infrastructure business; this strategic pivot included entering a 15-year master lease agreement with T-Mobile covering more than 2,000 towers and extended leases on 600 additional sites, alongside retaining approximately 70% of its pre-sale spectrum portfolio. Subsequent developments encompass the appointment of Anthony Carlson as permanent chief executive officer effective November 16 2025 succeeding interim leader Douglas W Chambers, as well as the acquisition of King Street Wireless Inc and Sunshine Spectrum Inc for $17 million in Q3 2025 anticipated to deliver approximately $50 million in tax benefits; these moves strengthen Array Digital Infrastructure's balance sheet, enhance its spectrum holdings and position it for sustained growth in the evolving wireless infrastructure sector.