AT&T Mobility II LLC ("Mobility II") is an indirect, wholly owned subsidiary of AT&T Inc. (NYSE: T). It was originally formed as Cingular Wireless II LLC and changed its legal name to AT&T Mobility II, LLC on April 20, 2007, following AT&T's acquisition of BellSouth. AT&T Inc., through subsidiaries, holds 100% of Mobility II's LLC units; AT&T Mobility LLC holds a majority (roughly 53.5%) direct interest, and Mobility II and AT&T Mobility LLC are managed and controlled by AT&T Mobility Corporation. Its address and principal operations sit within AT&T's wireless business, which is headquartered in the Lenox Park district of Brookhaven, Georgia (metro Atlanta). Mobility II does not report standalone headcount or revenue; those figures roll into AT&T Inc.'s consolidated financials.
Products / services. Mobility II is an operating telecom entity, not an NPE. It is a holding and operating vehicle for AT&T's U.S. wireless business and spectrum assets. It holds FCC wireless licenses, files and receives spectrum assignment applications (for example, with EchoStar Corporation and its subsidiaries under a License Purchase Agreement), and has served as an issuance vehicle for AT&T financing — in June 2023 Apollo-affiliated investors agreed to invest $2.0 billion in preferred equity securities issued by Mobility II. It is one of several AT&T named entities (alongside AT&T Inc., AT&T Corp., AT&T Communications LLC, AT&T Mobility LLC, and AT&T Services Inc.) that appear jointly in litigation.
Patent-litigation posture. Mobility II appears in the tracked data as a defendant only (1 case, 0 as plaintiff) — consistent with an operating company being sued, not a patent assertor. The single tracked matter is Adaptive Spectrum and Signal Alignment, Inc. v. AT&T Inc. et al., No. 2:24-cv-00029 (E.D. Tex., Marshall Division), filed January 19, 2024, before Judge Rodney Gilstrap. The Eastern District of Texas is a historically plaintiff-friendly patent venue.
Notable context. The asserted patents concern broadband/Wi-Fi network management (e.g., DOCSIS 3.1 profile management and Wi-Fi band steering). AT&T moved to transfer venue to N.D. Cal. based on a forum-selection clause in a prior ASSIA–SBC agreement and raised a license defense; a Markman hearing was held in March 2025 and trial was scheduled for September 2025. Nothing here indicates Mobility II itself asserts patents.