T-Mobile US, Inc., together with its subsidiaries, provides mobile communications services in the United States, Puerto Rico, and the United States Virgin Islands. The company offers voice, messaging, and data services to customers in the postpaid, prepaid, and wholesale and other services. It also provides wireless devices, including smartphones, wearables, tablets, home broadband routers, and other mobile communication devices, as well as wireless devices and accessories; financing through equipment installment plans; reinsurance for device insurance policies and extended warranty contracts; leasing through JUMP! On Demand; and High Speed Internet services. In addition, the company offers services, devices, and accessories under the T-Mobile and Metro by T-Mobile brands through its owned and operated retail stores, T-Mobile app and customer care channels, and its websites. It also sells its devices to dealers and other third-party distributors for resale through independent third-party retail outlets and various third-party websites. The company was founded in 1994 and is headquartered in Bellevue, Washington. T-Mobile US, Inc. operate as a subsidiary Deutsche Telekom AG

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.

América Móvil, S.A.B. de C.V. provides telecommunications services in Latin America and internationally. The company offers wireless and fixed voice services, including airtime, local, domestic, and international long-distance services; and network interconnection services. It provides data services, such as data centers, data administration, and hosting services to residential and corporate clients; value-added services, including Internet access, messaging and other wireless entertainment, and corporate services; data transmission, email services, instant messaging, content streaming, and interactive applications; and wireless security services, mobile payment solutions, machine-to-machine services, mobile banking, virtual private network services, and video calls and personal communications services. In addition, the company offers residential broadband services; IT solutions to small businesses and large corporations; and cable and satellite television subscriptions. Further, it sells equipment, accessories, and computers; and offers telephone directories, wireless security, call center, advertising, media, and software development services. Additionally, the company provides video, audio, and other media content through the Internet directly from the content provider to the end user. It sells its products and services under the Telcel, Telmex Infinitum, and A1 brands through a network of retailers and service centers to retail customers; and through sales force to corporate customers. The company was incorporated in 2000 and is based in Mexico City, Mexico.

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.

United States Cellular Corporation provides wireless telecommunications services in the United States. The company offers wireless services, including voice, messaging, and data services. It also provides wireless devices, such as handsets, tablets, mobile hotspots, home phones, and routers, as well as wireless essentials, including cases, screen protectors, chargers, and memory cards; and consumer electronics comprising audio, home automation, and networking products. In addition, it sells wireless devices to agents and other third-party distributors for resale; and offers option for customers to purchase devices and accessories under installment contracts. Further, the company offers wireless roaming, wireless eligible telecommunications carrier, and wireless tower rental services. It serves consumer, business, and government customers. The company provides its products and services through retail sales, direct sales, telesales, ecommerce, resellers, and independent agents, as well as third-party national retailers. United States Cellular Corporation was incorporated in 1983 and is headquartered in Chicago, Illinois. United States Cellular Corporation is a subsidiary of Telephone and Data Systems, Inc.

Iridium Communications Inc. provides mobile voice and data communications services and products to businesses, the United States and international governments, non-governmental organizations, and consumers worldwide. The company offers postpaid mobile voice and data satellite communications; prepaid mobile voice satellite communications; push-to-talk; broadband data; and Internet of Things (IoT) services. It also provides hosted payload and other data services, such as satellite time and location services; and inbound connections from the public switched telephone network, short message, subscriber identity module, activation, customer reactivation, and other peripheral services. In addition, the company offers voice and data solutions comprising personnel tracking devices; asset tracking devices for equipment, vehicles, and aircrafts; beyond-line-of-sight aircraft communications applications; maritime communications applications; specialized communications solutions for high-value individuals; mobile communications and data devices for the military and other government agencies, such as secure satellite handsets, as well as netted voice, messaging, and paging services; and maintenance services for the United States government's dedicated gateway. Further, it provides satellite handsets, voice and data modems, broadband data devices, and IoT data devices; various accessories for its devices that include batteries, holsters, earbud headphones, portable auxiliary antennas, antenna adaptors, USB data cables, charging units, and others; and engineering and support services. Iridium Communications Inc. sells its products and services to commercial end users through a wholesale distribution network that include service providers, and value-added resellers and manufacturers. The company was formerly known as Iridium Holdings LLC and changed its name to Iridium Communications Inc. in September 2009. Iridium Communications Inc. is headquartered in McLean, Virginia.

Consolidated Communications Holdings, Inc., together with its subsidiaries, provides broadband and business communication solutions for consumer, commercial, and carrier channels in the United States. It offers high-speed broadband Internet access, SIP trunking, and voice over Internet protocol (VoIP) phone services; commercial data connectivity services in various markets, including Ethernet services, private line data services, software defined wide area network, and multi-protocol label switching services; networking services; cloud-based services; and data center and disaster recovery solutions. The company also provides voice services, such as local phone and long-distance services; and high-speed fiber data transmission services to regional and national interexchange; and wireless carriers, including Ethernet, cellular backhaul, dark fiber, and colocation services. In addition, it sells business equipment, as well as offers related hardware and maintenance support, video, and other miscellaneous services. Further, the company offers video services comprising high-definition television, digital video recorders (DVR), and/or a whole home DVR; and in-demand streaming TV services that provide endless entertainment options. Additionally, it provides network access services that include interstate and intrastate switched access, network special access, and end user access; and telephone directory publishing, video advertising, billing and support, and other miscellaneous services. The company was founded in 1894 and is headquartered in Mattoon, Illinois.