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List Of UMTS Networks
The following is a list of mobile telecommunications networks using third-generation Universal Mobile Telecommunications System (UMTS) technology. This list does not aim to cover all networks, but instead focuses on networks deployed on frequencies other than 2100 MHz which is commonly deployed around the globe and on Multiband deployments. General information * For technical details on UMTS and a list of its designated operating frequencies, bands, and their common names, see UMTS frequency bands. * Networks on the global UMTS-bands 1 and 8 are suitable for global roaming in ITU Regions 1, 2 (some countries) and 3. * Networks on UMTS-bands 2 and 4 allow roaming in ITU Region 2 (Americas) only. * Networks on UMTS band 5 are suitable for roaming in ITU Regions 2 and 3 (single countries). Europe, Middle East & Africa (EMEA) Networks in Europe, the Middle East and Africa are exclusively deployed on 2100 MHz (Band 1) and/or 900 MHz (Band 8). Americas Carib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Telephony
Mobile telephony is the provision of wireless telephone services to mobile phones, distinguishing it from fixed-location telephony provided via landline phones. Traditionally, telephony specifically refers to voice communication, though the distinction has become less clear with the integration of additional features such as text messaging and data services. Modern mobile phones connect to a terrestrial cellular network of base stations (commonly referred to as cell sites), using radio waves to facilitate communication. Satellite phones use wireless links to orbiting satellites, providing an alternative in areas lacking local terrestrial communication infrastructure, such as landline and cellular networks. Cellular networks, satellite networks, and landline systems are all linked to the public switched telephone network (PSTN), enabling calls to be made to and from nearly any telephone worldwide. As of 2010, global estimates indicated approximately five billion mobile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion of the Americas. South America is bordered on the west by the Pacific Ocean, on the north and east by the Atlantic Ocean, and to the south by the Drake Passage; North America and the Caribbean Sea lie to the northwest. The continent includes twelve sovereign states: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela; two dependent territory, dependent territories: the Falkland Islands and South Georgia and the South Sandwich Islands; and one administrative division, internal territory: French Guiana. The Dutch Caribbean ABC islands (Leeward Antilles), ABC islands (Aruba, Bonaire, and Curaçao) and Trinidad and Tobago are geologically located on the South-American continental shel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Personal Digital Cellular
Personal Digital Cellular (PDC) was a 2G mobile telecommunications standard used exclusively in Japan. After a peak of nearly 80 million subscribers to PDC, it had 46 million subscribers in December 2005, and was slowly phased out in favor of 3G technologies like W-CDMA and CDMA2000. At the end of March 2012, the count had dwindled down to almost 200,000 subscribers. NTT Docomo shut down their network, mova, on April 1, 2012 at midnight. Technical overview Like D-AMPS and GSM, PDC uses TDMA. The standard was defined by the RCR (later became ARIB) in April 1991, and NTT DoCoMo launched its Digital mova service in March 1993. PDC uses 25 kHz carrier, pi/4- DQPSK modulation with 3-timeslot 11.2 kbit/s (full-rate) or 6-timeslot 5.6 kbit/s (half-rate) voice codecs. PDC is implemented in the 800 MHz (downlink 810–888 MHz, uplink 893–958 MHz), and 1.5 GHz (downlink 1477–1501 MHz, uplink 1429–1453 MHz) bands. The air interface is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digitel GSM
Digitel is a mobile phone company in Venezuela, and the country's first to deploy a GSM network and to establish a per second charging scheme. Early in 2007, Digitel surpassed 3 million subscribers and is currently placed third, behind CANTV's Movilnet and Telefonica's Movistar. Digitel's growth has remained steady. Digitel currently provides wireless data transmission capabilities through its GSM–GPRS and high speed EDGE network. In 2007 Digitel deployed an UMTS network on its existing 900 MHz spectrum.. In 2000, after receiving government approval, Digitel sold 56.56% of its stocks to Telecom Italia Mobile, changing its name to Digitel TIM. Digitel's network originally only covered Venezuela's central region, reaching around 44% of the entire population; however, in January 2006, a request to the government to approve merger with Venezuela's two other GSM networks (Digicel and Infonet) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ANTEL
The Administración Nacional de Telecomunicaciones (ANTEL, literally "National Administration of Telecommunications") is Uruguay's government-owned telecommunications company, founded in 1974 as a separate legal entity after spinning off the telecommunications division of UTE, which had the monopoly of landline telephony since 1931. The company has a monopoly of landline telephony and data services in the country. They also provide mobile phone services (in direct competition with Claro and Movistar) and Internet-related services, being the only provider of ADSL and land-line data services because of the monopoly situation. History In 1992, under the presidency of Luis Alberto Lacalle, a privatization of all government-owned companies was attempted. However, a later referendum revoked the privatizations law, Pluna being the only company to be successfully privatized to Varig. Antel enjoys a monopoly on land lines in Uruguay, including voice-only lines as well as DSL and fibe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vivo (telecommunications)
Vivo ( Portuguese for 'Live', as in Live Broadcasting, or 'Alive'), known as Vivo Brazil, is a brand of Telefônica Brasil, a subsidiary of Telefónica and the largest telecommunications company in Brazil. It is headquartered in the Brooklin Novo neighborhood of São Paulo. History The company was originally formed as part of Telebrás, the state-owned telecom monopoly at the time. In 1998, Telebrás was demerged and privatized. Telefónica bought Telesp, the São Paulo division, and rebranded it to Telefónica. On 15 April 2012, all Telefónica services were rebranded again to Vivo, using the same strategy of unifying all its services in a unique brand, like Movistar (Hispanic America and Spain) and O2 (rest of Europe). Merged companies The following operators merged to form Vivo: ''Owned by Telefónica'' *Telefónica Celular (Rio de Janeiro, Espírito Santo, Rio Grande do Sul) *Telebahia Celular (Bahia) *Telergipe Celular (Sergipe) * Telesp Landline (São Paulo) ''Owned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TIM Brasil
TIM Brasil Serviços e Participações S.A., commonly known as TIM Brasil, is a Brazilian telecommunications company, subsidiary of TIM S.p.A., which provides mobile and fixed telephony services. TIM Brasil was founded in 1995 and started commercial operations in 1998. Since 2002, has consolidated its national presence, becoming the first mobile phone operator present in all Brazilian States and, as of April 2017, has over 61.3 million customers. The company, through the GSM technology, has a national reach of approximately 93% of urban population and offers services to mobile and fixed telephony, data transmission, and Internet access at high speed. TIM Brasil is headquartered in Rio de Janeiro and is listed in B3 and NYSE, in São Paulo and New York City, respectively. In 2009 TIM Brasil acquired Intelig Telecom. The process led to the merger of Intelig into TIM. On May 5, 2012, TIM's chairman Luca Luciani resigned from all of his duties at TIM both in Brazil and It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nextel Communications
Nextel Communications, Inc. was an American wireless service operator that merged with and ceased to exist as a subsidiary of Sprint Corporation, which would later be bought by T-Mobile US and folded into that company. Nextel in Brazil, and formerly in Argentina, Chile, Peru, the Philippines, and Mexico, is part of NII Holdings, a stand-alone, publicly traded company not owned by Sprint Corporation. Nextel Communications traces its roots to the 1987 foundation of FleetCall by Morgan O'Brien, Brian McAuley, Chris Rogers, and Peter Reinheimer. FleetCall changed its name to Nextel Communications, Inc. in 1993. Nextel provided digital, wireless communications services, originally focusing on the fleet and dispatch customers, but later marketed to all potential wireless customers. Nextel's network operated in the 800-MHz Specialized Mobile Radio band and used iDEN technology developed by Motorola. Nextel's iDEN network offered a then unique push-to-talk "walkie-talkie" feature in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Claro Americas
The Claro Company, or simply Claro, is a Brazilian-founded Latin American telecommunications company, part of América Móvil, a Mexican telecom group. Claro serves customers in Argentina, Brazil, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Puerto Rico and Uruguay. Its Mexican operations are branded as Claro Mexico. The company's name means "bright," "clear," and also "of course," in both Portuguese and Spanish. Argentina, Paraguay and Uruguay Headquartered in Córdoba, Argentina, Claro was launched in Argentina, Paraguay and Uruguay on March 25, 2008 in a rebranding of CTI Móvil. the former served more than 12.8 million subscribers on CDMA/1XRTT and GSM/GPRS/EDGE wireless. CTI Móvil purchased Hutchison Telecom operation in Paraguay (which operated as "PortHable") in July 2005 to begin serving customers in that country. As of 2006, Claro competed with international operators such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Companhia De Telecomunicações Do Brasil Central
Algar Telecom is a Brazilian telecommunications company present in the states of Goiás, Mato Grosso do Sul, Minas Gerais, Paraná, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, São Paulo, and in the Federal District as well. The company is the only operator that remained private, even after the creation of Telebrás in the military regime, and it is characterized as the fifth largest company in the telecommunications segment. It serves more than one million and four hundred thousand customers - individuals, micro and small businesses, corporate customers, and carriers. History Algar Telecom, headquartered in Uberlândia - State of Minas Gerais, is one of the companies of Grupo Algar and was founded with the name CTBC - Companhia Telefônica da Borda do Campo on February 15, 1954, by Alexandrino Garcia, who acquired Companhia Telefônica Teixeirinha. Alexandrino was 47 years old when he started the business in the telephony industry and began, at the time, to personally sell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T-Mobile US
T-Mobile US, Inc. is an American wireless network operator headquartered in Bellevue, Washington. Its majority shareholder and namesake is the German telecommunications company Deutsche Telekom. T-Mobile is the second largest wireless carrier in the United States, with 131 million subscribers as of March 31, 2025. The company was founded in 1994 by John W. Stanton of the Western Wireless Corporation as VoiceStream Wireless. Deutsche Telekom then gained plurality ownership in 2001 and renamed it after its global T-Mobile brand. , the German company holds a 51.4% stake in the company. T-Mobile US operates two main brands: T-Mobile and Metro by T-Mobile (acquired in a 2013 reverse takeover of MetroPCS that also led to T-Mobile's listing on the NASDAQ). In 2020, T-Mobile expanded through the acquisition of Sprint, which also made T-Mobile the operator of Assurance Wireless, a service subsidized by the federal Lifeline program. The company's growth continued in 2024 wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
