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China Telecom Corporation Limited, together with its subsidiaries, provides wireline and mobile telecommunications services primarily in the People's Republic of China. It offers wireline voice services, including local wireline telephone services and long distance wireline services; CDMA mobile voice services, such as local calls, domestic and international long distance calls, intra-provincial roaming, and inter-provincial roaming and international roaming; wireline Internet access services comprising dial-up and broadband services; wireless Internet access services; and wireline, Internet, and mobile value-added services. The company also provides Best Tone information services; and information technology-based integrated solutions, such as system integration and consulting, outsourcing, special advisory, information application, knowledge, and software development services. In addition, it offers managed data services that include digital data network, frame relay, and asynchronous transfer mode services for government agencies, large corporations, and institutions; and leased line services, as well as sells, repairs, and maintains customer-end equipment. Further, the company provides international telecommunications services, including network, Internet access and transit, Internet data center, and mobile virtual network services in various countries, including the Asia Pacific, Europe, Africa, South America, and North America; and music production and related information, instant messenger, finance leasing, capital and financial management, and e-commerce services, as well as sells telecommunications terminals. As of December 31, 2019, it had approximately 336 million mobile subscribers; 153 million wireline broadband subscribers; and 111 million access lines in service. The company was incorporated in 2002 and is based in Wanchai, Hong Kong. China Telecom Corporation Limited is a subsidiary of China Telecommunications Corporation.

Swisscom AG provides telecommunication services primarily in Switzerland, Italy, and internationally. It operates through three segments: Swisscom Switzerland, Fastweb, and Other Operating. The company offers mobile and fixed-network services, such as telephony, TV, broadband, and mobile offerings, as well as sells terminal equipment; and telecom and communications solutions for large corporations and small and medium-sized enterprises. It also provides cloud, outsourcing, workplace, mobile phone, networking, business process optimization, SAP, and security and authentication solutions, as well as a range of services to the banking industry; Internet of Things solutions; digitization services to the healthcare sector; IT systems for health insurance companies; fixed-line and mobile networks by other telecommunication service providers; and roaming to foreign operators whose customers use its mobile networks, as well as broadband services and regulated products. In addition, the company plans, operates, and maintains network infrastructure and IT systems; provides support functions to finance, human resource, and strategy, as well as management of real estate and vehicle fleet; and offers broadband and mobile services, such as telephony, mobile offerings, and broadband services, as well as ICT solutions for residential, business, and wholesale customers. Further, it provides IT and network services; online and telephone directories; and cross-platform retail media and security communication services, as well as builds and maintains wired and wireless networks. The company was founded in 1998 and is based in Bern, Switzerland.

Telefónica, S.A., together with its subsidiaries, provides telecommunications services in Europe and Latin America. The company offers mobile and related services and products, such as mobile voice, value added, mobile data and internet, wholesale, corporate, roaming, fixed wireless, and trunking and paging services. It also provides fixed telecommunication services, including PSTN lines; ISDN accesses; public telephone services; local, domestic, and international long-distance and fixed-to-mobile communications; corporate communications; supplementary value-added services; video telephony; intelligent network; and telephony information services, as well as leases and sells handset equipment and telephony information services. It also provides Internet and broadband multimedia services comprising internet service provider, portal and network, retail and wholesale broadband access, narrowband switched access, security, internet through fibre to the home, and voice over internet protocol services. In addition, the company offers leased line, virtual private network, fibre optics, web hosting and application, managed hosting, content delivery, outsourcing and application, desktop, and system integration and professional services. Further, the company offers wholesale services for telecommunication operators, including domestic interconnection and international wholesale services; leased lines for other operators; and local loop leasing services, as well as bit stream services, wholesale line rental accesses, and leased ducts for other operators' fiber deployment. Additionally, it provides video/TV services; smart connectivity and services, and consumer IoT products; financial and other payment, security, cloud, advertising, big data, and digital experience services; Aura; open gateway, living apps; smart Wi-Fi, Phoenix, NT, Solar 360, and Movistar Home devices. Telefónica, S.A. was incorporated in 1924 and is headquartered in Madrid, Spain.

Telstra Corporation Limited provides telecommunications and information services to businesses, governments, and individuals in Australia and internationally. It operates in four segments: Telstra Consumer and Small Business, Telstra Enterprise, Networks and IT, and Telstra InfraCo. The company offers telecommunication, media and technology products and services in Australia using mobile and fixed network technologies, as well as operates call centers, retail stores, a dealership network, digital channels, distribution systems and Telstra Plus customer loyalty program. It also provides network capacity and management, unified communications, cloud, security, industry solutions, integrated and monitoring services to government and large enterprise and business customers; wholesale services, including voice and data; and telecommunication products and services to other carriers, carriage service providers, and internet service providers, as well as builds and manages digital platforms. In addition, the company operates the fixed passive network infrastructure, including data centers, exchanges, poles, ducts, pits and pipes, and fiber network; provides wholesale customers with access to network infrastructure; provides long-term access to components of infrastructure under the infrastructure services agreement; designs and constructs fiber, exchanges, and other infrastructure; and operates the passive and physical mobile tower assets owned or operated by the Amplitel Pty Ltd. The company was formerly known as Australian and Overseas Telecommunications Corporation Limited and changed its name to Telstra Corporation Limited in April 1993. Telstra Corporation Limited was founded in 1901 and is based in Melbourne, Australia.

Vivendi SE operates as an entertainment, media, and communication company in France, the rest of Europe, the Americas, Asia/Oceania, and Africa. It operates through Canal+ Group, Lagardère, Havas, Prisma Media, Gameloft, Vivendi Village, New Initiatives, and Generosity and Solidarity segments. The Canal+ Group segment publishes and distributes premium and thematic pay-TV and free-to-air channels; and produces, sells, and distributes movies and TV series. The Lagardère segment engages in the publishing, media, and travel retail activities. The Havas segment includes communications disciplines, such as creativity, media expertise, and healthcare/wellness. The Prisma Media segment publishes French magazines and online videos. The Gameloft segment engages in the creation and publishing of downloadable video games for various console-PC-mobile platforms, tablets, triple-play boxes, and smart TVs. The Vivendi Village segment provides ticketing services and live performances through Olympia production, festival production, and venues. The New Initiatives segment operates Dailymotion, a video content aggregation and distribution platform, as well as develops ultra-high-speed Internet service. The Generosity and Solidarity segment operates CanalOlympia; and Vivendi Foundation, a Create Joy solidarity program, which supports initial and professional training projects. The company was founded in 1853 and is headquartered in Paris, France.