Short Message/Messaging Service, commonly abbreviated as SMS, is a text messaging service component of most telephone, Internet and mobile device systems. It uses standardized communication protocols that let mobile devices exchange short text messages. An intermediary service can facilitate a text-to-voice conversion to be sent to landlines.
Telia Company AB is a Swedish multinational telecommunications company and mobile network operator present in Sweden, Finland, Norway, Denmark, Estonia, Latvia and Lithuania.
A SIM card is an integrated circuit (IC) intended to store securely the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices. Technically the actual physical card is known as a universal integrated circuit card (UICC); this smart card is usually made of PVC with embedded contacts and semiconductors, with the SIM as its primary component. In practice the term "SIM card" refers to the entire unit and not simply the IC.
Roaming is a wireless telecommunication term typically used with mobile devices, such as mobile phones. It refers to a mobile phone being used outside the range of its native network and connecting to another available cell network.
3G is the third generation of wireless mobile telecommunications technology. It is the upgrade over 2G, 2.5G, GPRS and 2.75G Enhanced Data Rates for GSM Evolution networks, offering faster data transfer, and better voice quality. This network was superseded by 4G, and later on by 5G. This network is based on a set of standards used for mobile devices and mobile telecommunications use services and networks that comply with the International Mobile Telecommunications-2000 (IMT-2000) specifications by the International Telecommunication Union. 3G finds application in wireless voice telephony, mobile Internet access, fixed wireless Internet access, video calls and mobile TV.
A mobile virtual network operator (MVNO) is a wireless communications services provider that does not own the wireless network infrastructure over which it provides services to its customers. An MVNO enters into a business agreement with a mobile network operator to obtain bulk access to network services at wholesale rates, then sets retail prices independently. An MVNO may use its own customer service, billing support systems, marketing, and sales personnel, or it could employ the services of a mobile virtual network enabler (MVNE).
GSM services are a standard collection of applications and features available over the Global System for Mobile Communications (GSM) to mobile phone subscribers all over the world. The GSM standards are defined by the 3GPP collaboration and implemented in hardware and software by equipment manufacturers and mobile phone operators. The common standard makes it possible to use the same phones with different companies' services, or even roam into different countries. GSM is the world's most dominant mobile phone standard.
A prepaid mobile device, also known as a pay-as-you-go (PAYG), pay-as-you-talk, pay and go, go-phone, prepay or burner phone, is a mobile device such as a phone for which credit is purchased in advance of service use. The purchased credit is used to pay for telecommunications services at the point the service is accessed or consumed. If there is no credit, then access is denied by the cellular network or Intelligent Network. Users can top up their credit at any time using a variety of payment mechanisms.
Tele2 AB is a provider of mobile and fixed connectivity, telephony, data network services, TV, streaming and global Internet of Things services, amongst others, to consumers and enterprises. It is headquartered in Kista Science City, Stockholm, Sweden. It is a major mobile network operator in Sweden, Estonia, Latvia and Lithuania.
TracFone Wireless, Inc. (TFWI) is an American prepaid, no-contract mobile phone provider. TFWI is a subsidiary of Verizon Communications, and offers products and services under several brands. It operates as a mobile virtual network operator (MVNO), holding agreements with the three largest United States wireless network operators to provide service: AT&T Mobility, T-Mobile US, and Verizon.
Turkcell İletişim Hizmetleri A.Ş. is the leading mobile phone operator of Turkey, based in Istanbul. The company has 39,3 million subscribers as of September 2021. In 2015, the company's number of subscribers climbed to 68.9 million, in nine countries Largest shareholder is Turkey Wealth Fund with 26.2% ownership. It is one of the world's biggest companies list published by Fortune. Turkcell has also developed Yaani, a browser for mobile and desktop. Turkcell's general manager is Murat Erkan.
Xfera Móviles, S.A.U., d/b/a Yoigo, is the fourth-largest mobile network operator in Spain and a subsidiary of the Spanish telecommunications company Grupo MásMóvil. Yoigo has a licence and its own cellular network for GSM/2G, UMTS/3G and LTE/4G technologies, and a national roaming agreement for usage of the 2G, 3G and 4G networks of Orange and Movistar.
Generic Access Network (GAN) is a protocol that extends mobile voice, data and multimedia applications over IP networks. Unlicensed Mobile Access (UMA) is the commercial name used by mobile carriers for external IP access into their core networks. The latest generation system is named Wi-Fi calling or VoWiFi by a number of handset manufacturers, including Apple and Samsung, a move that is being mirrored by carriers like T-Mobile US and Vodafone. The service is dependent on IMS, IPsec, IWLAN and ePDG.
Yettel Bulgaria is a mobile network and the third largest fixed telecommunications company in Bulgaria. The company was founded under the name "Cosmo Bulgaria Mobile" in 2001 by OTE and operated under the brand name "Globul" until 2014. In 2013 it was bought by Telenor and changed its name. In August 2018, the company was acquired by PPF, a Czech private investment fund. The company continued to use the Telenor brand until 1 March 2022, when it was renamed to Yettel Bulgaria.
The Roaming Regulation 2022 bans roaming charges (Eurotariff) within the European Economic Area (EEA), which consists of the member states of the European Union, Iceland, Liechtenstein and Norway. This regulates both the charges mobile network operator can impose on its subscribers for using telephone and data services outside of the network's member state, and the wholesale rates networks can charge each other to allow their subscribers access to each other's networks. The 2012 Regulation was recast in 2022.
Total Access Communication Public Company Limited, commonly known as DTAC, is a GSM mobile phone company in Thailand. It is the nation's third largest GSM phone company, after AIS and True. DTAC is owned by Norwegian company Telenor both directly and indirectly, and both companies share the same logo. As of 31 December 2011, DTAC had 23.2 million subscribers with a market share of subscribers at around 30 percent. As of 2019, the company has 20.642 million mobile subscriptions and 3904 employees. It is listed on the Singapore Exchange and the Stock Exchange of Thailand.
3 (Three), also known as Hutchison 3G, is a global brand name owned by Hutchison 3G Enterprises S.A.R.L., under which several UMTS-based mobile phone networks and broadband Internet providers operate in Hong Kong, Macau, Austria, Denmark, Indonesia, Ireland, Italy, Sweden, and the United Kingdom.
Freedom Mobile Inc. is a Canadian wireless telecommunications provider owned by Quebecor. It has 6% market share of the Canadian wireless market, mostly in urban areas of Ontario, British Columbia and Alberta. Freedom Mobile is the fourth-largest wireless carrier in Canada, with 2,290,497 subscribers as of November 30, 2022.
Hutchison 3G UK Ltd is a British telecommunications and internet service provider currently based in Reading, England. It is a subsidiary of CK Hutchison Holdings, operating under the global Three brand. Three is the fourth-largest mobile network operator in the United Kingdom, with about 10.3 million subscribers as of May 2023
