Sprint Spectrum LLC is a subsidiary of T-Mobile US, Inc., following T-Mobile's acquisition of Sprint Corporation which closed on April 1, 2020. The entity was established in the mid-1990s as part of Sprint's pioneering wireless efforts; the "Sprint Spectrum" brand was used for the first commercial Personal Communications Service (PCS) digital wireless network launched in the United States in November 1995. Following the merger, Sprint Spectrum LLC continues to exist as a subsidiary, with corporate records listing addresses in both Bellevue, Washington (T-Mobile's headquarters) and Overland Park, Kansas (Sprint's former headquarters).
Sprint Spectrum LLC functions as an operating or asset-holding subsidiary within T-Mobile, associated with wireless telecommunications services and spectrum licenses. Historically, the entity was central to Sprint's development of its nationwide digital network. The company is also registered as a contractor to provide wireless communication services to the U.S. federal government, including the Department of Justice. It is not a non-practicing entity (NPE).
The company's patent litigation posture is that of an operating company defending its services. Based on case data showing zero cases as a plaintiff and one as a defendant, Sprint Spectrum LLC is a target of patent assertions rather than an originator of them. The single tracked case was filed in the U.S. District Court for the Eastern District of Texas, a venue frequently used by patent plaintiffs.
The notable litigation involving the company is Arlington Technologies, LLC v. T-Mobile US, Inc. et al., filed in March 2025. This case directly involves Sprint Spectrum LLC alongside its parent, T-Mobile, underscoring the subsidiary's continued legal relevance after the merger. The plaintiff, Arlington Technologies LLC, has been identified by patent industry watchdogs Unified Patents and RPX as a non-practicing entity and a subsidiary of the monetization firm Dominion Harbor Group. The lawsuit asserts patents, formerly owned by Avaya, related to wireless networking and communications technology against the combined T-Mobile and Sprint operations.