The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation (2G) digital cellular networks used by mobile devices such as mobile phones and tablets. It was first deployed in Finland in December 1991. By the mid-2010s, it became a global standard for mobile communications achieving over 90% market share, and operating in over 193 countries and territories.
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP, UMTS is a component of the International Telecommunication Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology. UMTS uses wideband code-division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators.
Wi-Fi or WiFi is a family of wireless network protocols, based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves. These are the most widely used computer networks in the world, used globally in home and small office networks to link desktop and laptop computers, tablet computers, smartphones, smart TVs, printers, and smart speakers together and to a wireless router to connect them to the Internet, and in wireless access points in public places like coffee shops, hotels, libraries and airports to provide the public Internet access for mobile devices.
T-Mobile is the brand name used by some of the mobile communications subsidiaries of the German telecommunications company Deutsche Telekom AG in the Czech Republic, Poland, the United States and by the former subsidiary in the Netherlands.
CDMA2000 is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is developed by 3GPP2 as a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea.
4G is the fourth generation of broadband cellular network technology, succeeding 3G, and preceding 5G. A 4G system must provide capabilities defined by ITU in IMT Advanced. Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, and 3D television.
A cellular network or mobile network is a communication network where the link to and from end nodes is wireless. The network is distributed over land areas called "cells", each served by at least one fixed-location transceiver. These base stations provide the cell with the network coverage which can be used for transmission of voice, data, and other types of content. A cell typically uses a different set of frequencies from neighboring cells, to avoid interference and provide guaranteed service quality within each cell.
Rogers Wireless Inc. is a Canadian wireless telephone company headquartered in Toronto, providing service nationally throughout Canada. It is a wholly owned subsidiary of Rogers Communications. The company had revenues of just under $15.1 billion in 2018. Rogers Wireless is the largest wireless carrier in Canada, with 10.8 million subscribers as of Q3 2020.
The history of mobile phones covers mobile communication devices that connect wirelessly to the public switched telephone network.
Globe Telecom, Inc., commonly shortened as Globe, is a major provider of telecommunications services in the Philippines. The company operates the largest mobile network in the Philippines and one of the largest fixed-line and broadband networks. As of March 2022, Globe's total mobile subscriber base reached 87.4 million. It is also the country's largest telecommunications company in terms of market capitalization.
Mobile broadband is the marketing term for wireless Internet access via mobile networks. Access to the network can be made through a portable modem, wireless modem, or a tablet/smartphone or other mobile device. The first wireless Internet access became available in 1991 as part of the second generation (2G) of mobile phone technology. Higher speeds became available in 2001 and 2006 as part of the third (3G) and fourth (4G) generations. In 2011, 90% of the world's population lived in areas with 2G coverage, while 45% lived in areas with 2G and 3G coverage. Mobile broadband uses the spectrum of 225 MHz to 3700 MHz.
The Bridge Alliance is a business alliance of 34 major mobile telecommunications companies in Asia, Australia, Africa and the Middle East. It uses connectivity and a suite of integrated value-added services, including IoT/M2M, Optimization and Enterprise Mobility, for all alliance members' subscribers while roaming on each other's networks. The concept is similar to that of the FreeMove alliance in Europe, with whom the Bridge Alliance has a partnership.
Iran Mobile Communications Company, commonly abbreviated as MCI and also known under its brand name Hamrahe Avval, is the first and largest mobile operator in Iran. MCI is a subsidiary of the Telecommunication Company of Iran and has approximately 17 million postpaid and 49 million prepaid subscribers. Hamrahe Aval's service is available in 1,239 cities and over 70,000 kilometers of highway in Iran is sheet. It provides roaming services via 271 partner operators in more than 112 countries.
In telecommunications, Long-Term Evolution (LTE) is a standard for wireless broadband communication for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA standards. It improves on those standards' capacity and speed by using a different radio interface and core network improvements. LTE is the upgrade path for carriers with both GSM/UMTS networks and CDMA2000 networks. Because LTE frequencies and bands differ from country to country, only multi-band phones can use LTE in all countries where it is supported.
T-Mobile US, Inc. is an American wireless network operator headquartered in Bellevue, Washington, U.S. The parent company and largest shareholder is the German telecommunications company Deutsche Telekom AG, which as of August 2022, holds 64.78% of the common stock. T-Mobile is the second-largest wireless carrier in the United States, with more than 110 million subscribers as of the end of Q2 2022.
In telecommunications, 5G is the fifth-generation technology standard for broadband cellular networks, which cellular phone companies began deploying worldwide in 2019, and is the planned successor to the 4G networks which provide connectivity to most current cellphones. 5G networks are predicted to have more than 1.7 billion subscribers worldwide by 2025, according to the GSM Association.
ViettelGroup is a Vietnamese multinational telecommunications company headquartered in Hanoi, Vietnam. Viettel is the largest telecommunications service provider in Vietnam. It is a state-owned enterprise and operated by the Ministry of Defence.
Airtel India is the second largest provider of mobile telephony and second largest provider of fixed telephony in India, and is also a provider of broadband and subscription television services. The brand is operated by several subsidiaries of Bharti Airtel, with Bharti Hexacom and Bharti Telemedia providing broadband fixed line services and Bharti Infratel providing telecom passive infrastructure service such as telecom equipment and telecom towers. Bharti Airtel Limited is part of Bharti Enterprises and is headed by Sunil Bharti Mittal.
