U.S. Cellular Corporation

U.S. Cellular Corporation, which now primarily does business as Array Digital Infrastructure, is a Chicago-based telecommunications company founded in 1983. It was established as a subsidiary of Telephone and Data Systems, Inc. (TDS), which remains its majority shareholder. In August 2025, U.S. Cellular completed the sale of its wireless operations and certain spectrum assets to T-Mobile US, Inc. for approximately $4.4 billion. Prior to this sale, U.S. Cellular was the fifth-largest wireless carrier in the United States, serving 4.4 million subscribers in 21 states. For the full year 2024, the company reported total operating revenues of $3.77 billion. As of December 2024, the company had 4,100 employees.

Following the sale of its mobile network operator business to T-Mobile, the company has shifted its focus. It now operates as a shared wireless communications infrastructure manager under the name Array Digital Infrastructure. The company retained ownership of approximately 70% of its wireless spectrum and its nearly 4,400 cell towers. T-Mobile has entered into a long-term lease agreement for over 2,000 of these towers. U.S. Cellular also reached agreements to sell other portions of its remaining wireless spectrum to AT&T and Verizon.

As a large operating company, U.S. Cellular's patent litigation history primarily involves defending against infringement suits. The provided data shows one tracked case where it is a defendant, which is consistent with the profile of an operating company being targeted by patent assertion entities. This case was filed in the Western District of Texas, a common venue for patent litigation.

The single tracked case is Disintermedation Services Inc. v. U.S. Cellular Corporation, filed in 2022 in the Western District of Texas. The plaintiff, Disintermedation Services Inc., appears to be a non-practicing entity (NPE) that has filed suits against various other companies. This pattern suggests U.S. Cellular's litigation posture is that of a target for NPEs, rather than an entity that actively asserts its own patent portfolio through litigation.