AT&T Inc. provides telecommunications and technology services worldwide. The company operates through two segments, Communications and Latin America. The Communications segment offers wireless voice and data communications services; and sells handsets, wireless data cards, wireless computing devices, carrying cases/protective covers, and wireless chargers through its own company-owned stores, agents, and third-party retail stores. It also provides Virtual Private Networks, AT&T Dedicated Internet, Ethernet, data services, cloud solutions, outsourcing, and managed professional services, as well as customer premises equipment for multinational corporations, small and mid-sized businesses, governmental, and wholesale customers. In addition, this segment offers broadband services, including fiber connections, legacy telephony voice communication services, and other VoIP services and equipment to residential customers. This segment markets its communications services and products under the AT&T, AT&T Business, Cricket, AT&T PREPAID, and AT&T Fiber brand names. The Latin America segment provides postpaid and prepaid wireless services in Mexico under the AT&T and Unefon brand names, as well as sells smartphones through its owned stores, agents and third-party retail stores. The company was formerly known as SBC Communications Inc. and changed its name to AT&T Inc. in 2005. AT&T Inc. was incorporated in 1983 and is based in Dallas, Texas.

Verizon Communications Inc., through its subsidiaries, engages in the provision of communications, technology, information, and entertainment products and services to consumers, businesses, and governmental entities worldwide. It operates in two segments, Verizon Consumer Group (Consumer) and Verizon Business Group (Business). The Consumer segment provides wireless services across the wireless networks in the United States under the Verizon and TracFone brands and through wholesale and other arrangements; and fixed wireless access (FWA) broadband through its wireless networks, as well as related equipment and devices, such as smartphones, tablets, smart watches, and other wireless-enabled connected devices. The segment also offers wireline services in the Mid-Atlantic and Northeastern United States, as well as Washington D.C. through its fiber-optic network, Verizon Fios product portfolio, and a copper-based network. The Business segment provides wireless and wireline communications services and products, including FWA broadband, data, video and conferencing, corporate networking, security and managed network, local and long-distance voice, and network access services to deliver various IoT services and products to businesses, government customers, and wireless and wireline carriers in the United States and internationally. The company was formerly known as Bell Atlantic Corporation and changed its name to Verizon Communications Inc. in June 2000. Verizon Communications Inc. was incorporated in 1983 and is headquartered in New York, New York.

Chunghwa Telecom Co., Ltd., together with its subsidiaries, provides telecommunication services in Taiwan and internationally. It operates through Consumer Business, Enterprise Business, International Business, and Others segments. The company offers local, domestic long distance, and international long distance fixed-line telephone services; mobile services such as prepaid and postpaid plans; broadband plans; and internet and data services. Chunghwa Telecom Co., Ltd. was incorporated in 1996 and is headquartered in Taipei City, Taiwan.

Telefonaktiebolaget LM Ericsson (publ), together with its subsidiaries, provides mobile connectivity solutions for telcom operators and enterprise customers in various sectors in North America, Europe, Latin America, the Middle East, Africa, North East Asia, South East Asia, Oceania, and India. It operates in four segments: Networks; Cloud Software and Services; Enterprise; and Other. The Networks segment offers radio access network (RAN) solutions for various network spectrum bands, including purpose-built and open RAN-prepared hardware and software. This segment also provides cloud RAN; transport solutions; passive and active antennas; and a range of service portfolios covering network deployment and support. The Cloud Software and Services segment offers core networks, business and operational support systems, network design and optimization, and managed network services. The Enterprise segment offers a global communications platform, including cloud-based unified communications as a service, contact center as a service, and communications platform as a service; enterprise wireless solutions comprising private wireless networks and wireless wan pre-packaged solutions; and technologies and new business solutions, such as mobile financial services, security solutions, and advertising services. The Other segment includes Redbee media that prepares and distributes live and video services for broadcasters, sports leagues, and communications service providers. It offers its services through wholesalers and distributors. The company was formerly known as Allmanna Telefon AB LM Ericsson and changed its name to Telefonaktiebolaget LM Ericsson (publ) in January 1926. Telefonaktiebolaget LM Ericsson (publ) was founded in 1876 and is headquartered in Stockholm, Sweden.

Telefônica Brasil S.A., together with its subsidiaries, operates as a mobile telecommunications company in Brazil. Its fixed line services portfolio includes local, domestic long-distance, and international long-distance calls; and mobile portfolio comprises voice and broadband internet access through 3G, 4G, 4.5G, and 5G, as well as value-added and wireless roaming services. The company also offers data services, including broadband and mobile data services. In addition, it provides pay TV services through IPTV technologies; network services, such as rental of facilities; other services; wholesale services, including interconnection services to users of other network providers; and digital services, such as entertainment, cloud, and security and financial services. Further, the company offers multimedia communication services, which include audio, data, voice and other sounds, images, texts, and other information, as well as sells devices, such as smartphones, broadband USB modems, and other devices. Additionally, it provides telecommunications solutions and IT support to various industries, such as retail, manufacturing, services, financial institutions, government, etc. It markets and sells its solutions through own stores, dealers, retail and distribution channels, door-to-door sales, and outbound tele sales. The company was formerly known as Telecomunicações de São Paulo S.A. - TELESP and changed its name to Telefônica Brasil S.A. in October 2011. The company was incorporated in 1998 and is headquartered in São Paulo, Brazil.

Telecom Argentina S.A., together with its subsidiaries, provides telecommunications services. The company offers mobile telecommunications services, including voice communications, high-speed mobile Internet content and applications download, online streaming, and other services; and sells mobile communication devices, such as handsets, Modems MiFi and wingles, and smart watches. It also offers internet connectivity products, including virtual private network services, traditional Internet protocol links, and other products; and programming and other cable television services. In addition, the company provides telephone services, including local, domestic, and international long-distance telephone services, as well as public telephone services; and other related supplementary services, such as call waiting, call forwarding, conference calls, caller ID, voice mail, itemized billing, and maintenance services. Further, it offers Infrastructure, interconnection, datacenter, Internet, value added, and international long-distance services; and data services, including data transmission, virtual private networks, symmetric Internet access, national and international signal transport, and videoconferencing services; Personal Pay, a digital wallet service. The company was formerly known as Cablevisión S.A. and changed its name to Telecom Argentina S.A. in January 2018.Telecom Argentina S.A. was founded in 1979 and is based in Buenos Aires, Argentina.

ADTRAN Holdings, Inc., through its subsidiaries, provides networking and communications platforms, software, systems, and services in the United States, Germany, the United Kingdom, and internationally. It operates through two segments, Network Solutions, and Services & Support. It offers residential gateways; ethernet passive optical network ONUs; gigabit passive optical network/XGS-PON ONTs; traditional SSE, routers, and switches; edge cloud; carrier ethernet network interface devices; Optical Line Terminals; Packet Aggregation, Copper Access, and Oscilloquartz; optical transport and engine solutions; infrastructure monitoring solution; and training, professional, software, and managed services. The company also provides various software, such as Mosaic One SaaS, n-Command, Procloud, MCP, AOE and ACI-E, and Ensemble Controller. It serves large, medium, and small service providers; alternative service providers, such as utilities, municipalities and fiber overbuilders; cable/MSOs; and SMBs and distributed enterprises. ADTRAN Holdings, Inc. was incorporated in 1985 and is headquartered in Huntsville, Alabama.

Altice USA, Inc., together with its subsidiaries, provides broadband communications and video services in the United States, Canada, Puerto Rico, and the Virgin Islands. It offers broadband, video, telephony, and mobile services to residential and business customers. The company's video services include delivery of broadcast stations and cable networks; over the top services; video-on-demand, high-definition channels, digital video recorder, and pay-per-view services; and platforms for video programming through mobile applications. In addition, it provides voice over Internet protocol telephone services; and mobile services, such as data, talk, and text. Further, the company offers Ethernet, data transport, IP-based virtual private networks, Internet access, and telephony services; hosted telephony services, managed Wi-Fi, managed desktop and server backup, and collaboration services comprising audio and web conferencing; fiber-to-the-tower services to wireless carriers; data services consisting of wide area networking and dedicated data access, as well as wireless mesh networks; and enterprise class telephone services that include traditional multi-line phone service. Additionally, it provides hosted private branch exchange, network security, and international calling and toll-free numbers services. Furthermore, the company offers audience-based and multiscreen advertising solutions; data analytics; and news programming services, as well as operates news channels under the News 12 Networks, Cheddar, and i24NEWS names. It also provides broadband communications and video services under the Optimum and Suddenlink brands. Altice USA, Inc. was incorporated in 2015 and is headquartered in Long Island City, New York.