AT&T

Aira Technologies develops radio access network software that uses machine learning to predict and optimize wireless network performance. Its platform analyzes contextual data from mobile networks to make resources more efficient, enabling operators to improve throughput, coverage, and capacity while reducing energy consumption and total cost of ownership. The software aims to make networks more intelligent and self-evolving, delivering a better and consistent user experience in variable conditions.

AST SpaceMobile develops and manufactures satellites for a global broadband cellular network in space. This network directly connects with standard, unmodified mobile devices, aiming to eliminate connectivity gaps and bring broadband to the billions currently unconnected.

FiberTower Corporation is a provider of facilities‑based backhaul services to wireless carriers across the United States. The company constructs and operates high‑coverage, high‑capacity hybrid microwave and fiber networks, leveraging its spectrum assets and fiber relationships. It delivers transport services using protocols such as time division multiplexing, SONET, and Ethernet. FiberTower also specializes in millimeter‑band fixed wireless technology, leasing spectrum in the 24 GHz and 39 GHz bands for small‑cell and macro‑cell backhaul solutions. The firm serves thousands of customer locations in major markets including Atlanta, Boston, Chicago, Cleveland, Dallas/Fort Worth, Denver, Detroit, Houston, New York/New Jersey, Pittsburgh, San Antonio/Austin/Waco, Washington DC/N. Virginia/S. Maryland, and West Florida. It collaborates with carriers, equipment providers, and deployment partners on research and development initiatives. FiberTower Corporation is headquartered in San Francisco.

Carrier IQ is a mobile service intelligence platform that specializes in providing diagnostic analysis for smartphone users, primarily serving original equipment manufacturers (OEMs) and wireless carriers. The company offers a device that measures critical parameters of service quality and usage, enabling customers to conduct in-depth analyses of various usage scenarios and fault conditions. This analysis includes detailed insights based on type, location, application, and network performance, allowing for a comprehensive understanding of the mobile experience as perceived at the handset level, rather than merely assessing the network infrastructure. Through its services, Carrier IQ aims to enhance the overall quality of mobile services.

Blue Danube Systems, Inc. specializes in designing and developing next-generation wireless access solutions that enhance network capacity and quality of service for mobile networks. The company offers innovative products, including high-definition active antenna systems that integrate advanced hardware and intelligent software to optimize existing infrastructure, thereby improving the user experience. One of its notable offerings is BeamMaster, a platform focused on real-time user traffic detection and hotspot pattern recognition. Founded in 2006, Blue Danube Systems is headquartered in Mountain View, California, with an additional office located in Warren, New Jersey. The company engages in strategic collaborations to further its mission of advancing telecommunications technology.

Nextel Mexico offers its users with wireless communications services. The company is an analog specialized mobile radio operator that offers mobile radio voice, messaging, and data services for individuals and businesses. Nextel Mexico was founded in 1993 and it was acquired by AT&T on January 27, 2015.

Iusacell is a prominent provider of wireless telecommunications and cellular services in Mexico. The company made history by being the first to introduce mobile phone services in the country and later pioneered the launch of 3G technology and mobile Internet broadband. Currently, Iusacell is recognized as the first mobile phone company in Mexico to provide 4G network services. It offers a comprehensive range of mobile telephony services, including postpaid and prepaid plans, long-distance calling, paging, data transmission, and roaming services. Iusacell boasts national coverage and integrates the only two providers of wireless communication services in Mexico using CDMA technology, optimizing the efficiency of radio spectrum use.

Alltel is a telecommunications company based in Rockport, Texas, that offers a wide range of wireless communication services and products for both consumers and businesses. It serves various industries, including transportation, retail, insurance, healthcare, construction, and financial services. Alltel's offerings encompass wireless voice and data communication, postpaid and prepaid calling options, roaming and long-distance services, and diverse data solutions. The company provides additional services such as text and video messaging, digital gaming, radio streaming, internet access, and email. It also delivers business intelligence, field service automation, security, and systems management solutions, along with mobile handsets and accessories. As a subsidiary of Verizon Wireless and AT&T, Alltel plays a significant role in the telecommunications landscape in North America and the Caribbean.

Leap Wireless is a San Diego-based provider of digital wireless services operating under the Cricket brand. It offers unlimited voice and data plans without fixed-term contracts or credit checks, serving over 5 million customers across 35 states and D.C. The company operates on an all-digital 3G CDMA2000 network, offering features like unlimited minutes, texts, mobile web access, and directory assistance.

NextWave Wireless Inc. specializes in developing, producing, and marketing mobile multimedia and consumer electronic connectivity product solutions. The company operates in two segments: Multimedia Segment and Strategic Initiatives Segment. Through PacketVideo Corporation (PacketVideo or PV), NextWave Wireless offers embedded software for mobile handsets, client-server platforms for mobile media applications, and software for sharing media in the connected home. PacketVideo is a global provider of multimedia software and services, enabling mobile devices to stream, download, and play video and music, receive live TV, and engage in two-way video telephony.

picoChip specializes in signal processing products designed for wireless telecommunications systems. The company develops multi-core digital signal processors (DSPs) and has a notable portfolio of software-defined radio products that are widely utilized in the industry. Additionally, picoChip is expanding its offerings to include a range of application-specific standard products (ASSPs) that are optimized for both cost and performance, catering to the evolving needs of wireless communication technologies.

Edge Wireless LLC is a company that was acquired by AT&T in 2008.

Telecorp PCS is a telecommunication company that provides wireless communication services.

New Global Telecom is a leading provider of telecommunications infrastructure and services, specializing in the development of advanced networks across Latin America and Asia. The company primarily focuses on building direct networks and supplying international telecommunications services to Tier I carriers in the United States and other regions. With a monthly volume exceeding 90 million minutes sold to inter-exchange carriers globally, New Global Telecom has established a significant presence in the market. Additionally, the company leverages its extensive in-house expertise to offer a range of telecommunications management services designed to assist both emerging and established carriers in navigating the complexities of the evolving telecommunications landscape. As a fully integrated global communications provider, New Global Telecom delivers retail and wholesale internet, data, and switched voice services, positioning itself to lead the deployment of converged networks in emerging markets.

OmniSky was a San Francisco–based information technology consulting provider that specialized in wireless data applications and services, serving wireless carriers, hardware manufacturers, content providers, and other third parties.

AT&T Wireless began in 1987 as McCaw Cellular Communications, a cellular telephone pioneer in the United States.