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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.

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.

Telenor ASA, together with its subsidiaries, operates as a telecommunication company worldwide. It operates through four segments: Nordics, Asia, Infrastructure, and Amp. The company offers mobile subscriptions and handsets, telephony, broadband, data security, communications services, and TV services to residential and business customers, as well as wholesale services. It also builds, develops, maintains, and leases passive telecom infrastructure, such as towers, masts, and buildings. The company also provides machine-to-machine, internet-of-things, and inbound and national roaming services. Telenor ASA was founded in 1855 and is headquartered in Fornebu, Norway.

Perusahaan Perseroan (Persero) PT Telekomunikasi Indonesia Tbk provides information and communications technology, and telecommunications network services worldwide. The company operates through mobile, consumer, enterprise, Wholesale and International Business, and Other segments. The Mobile segment offers mobile voice, SMS, value added services, and mobile broadband services. The Consumer segment provides fixed wireline, pay TV, and internet services; and other telecommunication services to home customers. The Enterprise segment offers end-to-end solution to corporate and institutions. The Wholesale and International Business segment provides interconnection services, broadband access, information technology services, data, and internet services to other licensed operator and institutions. The Other segment offers digital content products, big data, business to business commerce, and financial services to individual and corporate customers. The company also engages in leasing of towers, and digital support and other telecommunication services; provision of consultation service of hardware, computer software, and data center, as well as multimedia portal services; business management consulting; property development and management; trading service related to telecommunication, information, multimedia technology, entertainment, and investment; and digital content exchange hub services. The company was founded in 1884 and is headquartered in Bandung, Indonesia.

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.