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1G refers to the first generation of wireless cellular technology (mobile telecommunications). These are the analog telecommunications standards that were introduced in the 1980s and continued until being replaced by 2G digital telecommunications. The main difference between the two mobile cellular systems (1G and 2G), is that the radio signals used by 1G networks are analog, while 2G networks are digital.

Wireless kind of telecommunication that does not require the use of physical wires; the transfer of information or power between two or more points that are not connected by an electrical conductor

Wireless communication is the transfer of information or power between two or more points that are not connected by an electrical conductor. The most common wireless technologies use radio waves. With radio waves distances can be short, such as a few meters for Bluetooth or as far as millions of kilometers for deep-space radio communications. It encompasses various types of fixed, mobile, and portable applications, including two-way radios, cellular telephones, personal digital assistants (PDAs), and wireless networking. Other examples of applications of radio wireless technology include GPS units, garage door openers, wireless computer mouse, keyboards and headsets, headphones, radio receivers, satellite television, broadcast television and cordless telephones. Somewhat less common methods of achieving wireless communications include the use of other electromagnetic wireless technologies, such as light, magnetic, or electric fields or the use of sound.

Cellular network communication network where the last link is wireless

A cellular network or mobile network is a communication network where the last link is wireless. The network is distributed over land areas called "cells", each served by at least one fixed-location transceiver, but more normally, three cell sites or base transceiver stations. 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 neighbouring cells, to avoid interference and provide guaranteed service quality within each cell.

Technology making, modification, usage, and knowledge of tools, machines, techniques, crafts, systems, and methods of organization

Technology is the collection of techniques, skills, methods, and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Technology can be the knowledge of techniques, processes, and the like, or it can be embedded in machines to allow for operation without detailed knowledge of their workings. Systems applying technology by taking an input, changing it according to the system's use, and then producing an outcome are referred to as technology systems or technological systems.


Although both systems use digital signaling to connect the radio towers (which listen to the handsets) to the rest of the telephone system, the voice itself during a call is encoded to digital signals in 2G whereas 1G is only modulated to higher frequency, typically 150 MHz and up. The inherent advantages of digital technology over that of analog meant that 2G networks eventually replaced them almost everywhere.

In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted. Most radio systems in the 20th century used frequency modulation (FM) or amplitude modulation (AM) for radio broadcast.

One such standard is Nordic Mobile Telephone (NMT), used in Nordic countries, Switzerland, the Netherlands, Eastern Europe and Russia. Others include Advanced Mobile Phone System (AMPS) used in North America and Australia, [1] TACS (Total Access Communications System) in the United Kingdom, C-450 in West Germany, Portugal and South Africa, Radiocom 2000 in France, TMA in Spain, and RTMI in Italy. In Japan there were multiple systems. Three standards, TZ-801, TZ-802, and TZ-803 were developed by NTT (Nippon Telegraph and Telephone Corporation [2] ), while a competing system operated by Daini Denden Planning, Inc. (DDI) [2] used the Japan Total Access Communications System (JTACS) standard.

Nordic Mobile Telephone

NMT is the first fully automatic cellular phone system. It was specified by Nordic telecommunications administrations (PTTs) and opened for service on 1 October 1981 as a response to the increasing congestion and heavy requirements of the manual mobile phone networks: ARP (150 MHz) in Finland, MTD (450 MHz) in Sweden and Denmark, and OLT in Norway.

Nordic countries Geographical and cultural region in Northern Europe and the North Atlantic

The Nordic countries or the Nordics are a geographical and cultural region in Northern Europe and the North Atlantic, where they are most commonly known as Norden. The term includes Denmark, Finland, Iceland, Norway, and Sweden, as well as Greenland and the Faroe Islands—which are both part of the Kingdom of Denmark—and the Åland Islands and Svalbard archipelagos that belong to Finland and Norway respectively, whereas the Norwegian Antarctic territories are often not considered a part of the Nordic countries, due to their geographical location. Several regions in Europe, such as the Northern Isles of Scotland, share cultural or ethnic ties with Nordic nations, but are not considered to be Nordic countries. Scandinavians, who comprise over three quarters of the region's population, are the largest group, followed by Finns, who comprise the majority in Finland; other ethnic groups are the Greenlandic Inuit, the Sami people, and recent immigrants and their descendants. The native languages Swedish, Danish, Norwegian, Icelandic, and Faroese are all North Germanic languages rooted in Old Norse. Native non-Germanic languages are Finnish, Greenlandic and several Sami languages. The main religion is Lutheran Christianity.

Switzerland federal republic in Central Europe

Switzerland, officially the Swiss Confederation, is a sovereign state situated in the confluence of western, central, and southern Europe. It is a federal republic composed of 26 cantons, with federal authorities seated in Bern. Switzerland is a landlocked country bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. It is geographically divided between the Alps, the Swiss Plateau and the Jura, spanning a total area of 41,285 km2 (15,940 sq mi), and land area of 39,997 km2 (15,443 sq mi). While the Alps occupy the greater part of the territory, the Swiss population of approximately 8.5 million is concentrated mostly on the plateau, where the largest cities are located, among them the two global cities and economic centres of Zürich and Geneva.

The antecedent to 1G technology is the mobile radio telephone.

Mobile radio telephone

Mobile radio telephone systems were telephone systems of wireless type that preceded the modern cellular mobile form of telephony technology. Since they were the predecessors of the first generation of cellular telephones, these systems are sometimes retroactively referred to as pre-cellular systems. Technologies used in pre-cellular systems included the Push to Talk, Mobile Telephone Service (MTS), Improved Mobile Telephone Service (IMTS), and Advanced Mobile Telephone System (AMTS) systems. These early mobile telephone systems can be distinguished from earlier closed radiotelephone systems in that they were available as a commercial service that was part of the public switched telephone network, with their own telephone numbers, rather than part of a closed network such as a police radio or taxi dispatch system.


The first commercially automated cellular network (the 1G generation) was launched in Japan by Nippon Telegraph and Telephone (NTT) in 1979, initially in the metropolitan area of Tokyo. Within five years, the NTT network had been expanded to cover the whole population of Japan and became the first nationwide 1G network.

Nippon Telegraph and Telephone Japanese telecommunication company

The Nippon Telegraph and Telephone Corporation, commonly known as NTT, is a Japanese telecommunications company headquartered in Tokyo, Japan. Ranked 55th in Fortune Global 500, NTT is the fourth largest telecommunications company in the world in terms of revenue, as well as the third largest publicly traded company in Japan after Toyota and MUFG, as of September 2018.

In 1981, the NMT system simultaneously launched in Denmark, Finland, Norway and Sweden. NMT was the first mobile phone network to feature international roaming. In 1983, the first 1G network launched in the USA was Chicago-based Ameritech using the Motorola DynaTAC mobile phone. Several countries then followed in the early to mid-1980s including the UK, Mexico and Canada.

Roaming is a wireless telecommunication term typically used with mobile devices. It refers to the mobile phone being used outside the range of its home network and connects to another available cell network.

AT&T Teleholdings, Inc., formerly known as Ameritech Corporation, is an American telecommunications company that arose out of the 1984 AT&T divestiture. Ameritech was one of the seven Regional Bell Operating Companies that was created following the breakup of the Bell System. Ameritech was acquired by SBC Communications in 1999 which subsequently acquired AT&T Corporation in 2006, becoming the present-day AT&T Inc.

Motorola DynaTAC first certificated mobile phone model

DynaTAC is a series of cellular telephones manufactured by Motorola, Inc. from 1983 to 1994. The Motorola DynaTAC 8000X commercial portable cellular phone received approval from the U.S. FCC on September 21, 1983. A full charge took roughly 10 hours, and it offered 30 minutes of talk time. It also offered an LED display for dialing or recall of one of 30 phone numbers. It was priced at $3,995 in 1984, its commercial release year, equivalent to $9,634 in 2018. DynaTAC was an abbreviation of "Dynamic Adaptive Total Area Coverage."

As of 2018, a limited NMT service in Russia remains the only 1G cellular network still in operation.

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Related Research Articles

Advanced Mobile Phone System

Advanced Mobile Phone System (AMPS) was an analog mobile phone system standard developed by Bell Labs, and officially introduced in the Americas on October 13, 1983, Israel in 1986, Australia in 1987, Singapore in 1988, and Pakistan in 1990. It was the primary analog mobile phone system in North America through the 1980s and into the 2000s. As of February 18, 2008, carriers in the United States were no longer required to support AMPS and companies such as AT&T and Verizon Communications have discontinued this service permanently. AMPS was discontinued in Australia in September 2000, in Pakistan by October 2004,, in Israel by January 2010, and Brazil by 2010.

At the most basic level, Personal Communications Service (PCS) describes a set of communications capabilities which allows some combination of terminal mobility, personal mobility, and service profile management. More specifically, PCS refers to any of several types of wireless voice or wireless data communications systems, typically incorporating digital technology, providing services similar to advanced cellular mobile or paging services. In addition, PCS can also be used to provide other wireless communications services, including services which allow people to place and receive communications while away from their home or office, as well as wireless communications to homes, office buildings and other fixed havelocations. Described in more commercial terms, PCS is a generation of wireless-phone technology that combines a range of features and services surpassing those available in analog- and digital-cellular phone systems, providing a user with an all-in-one wireless phone, paging, messaging, and data service.

Total Access Communication System

Total Access Communication System (TACS) and ETACS are mostly-obsolete variants of Advanced Mobile Phone System (AMPS) which was announced as the choice for the first two UK national cellular systems in February 1983, less than a year after the UK government announced the T&Cs for the two competing mobile phone networks in June 1982.

3G, short for third generation, is the third generation of wireless mobile telecommunications technology. It is the upgrade for 2G and 2.5G GPRS networks, for faster internet speed. This 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.

IS-54 and IS-136 are second-generation (2G) mobile phone systems, known as Digital AMPS (D-AMPS), and a further development of the North American 1G mobile system Advanced Mobile Phone System (AMPS). It was once prevalent throughout the Americas, particularly in the United States and Canada since the first commercial network was deployed in 1993. D-AMPS is considered end-of-life, and existing networks have mostly been replaced by GSM/GPRS or CDMA2000 technologies.

GSM frequency bands or frequency ranges are the cellular frequencies designated by the ITU for the operation of GSM mobile phones and other mobile devices.

Mobile telephony collective term for the operation of mobile telephone devices

Mobile telephony is the provision of telephone services to phones which may move around freely rather than stay fixed in one location. Mobile phones connect to a terrestrial cellular network of base stations, whereas satellite phones connect to orbiting satellites. Both networks are interconnected to the public switched telephone network (PSTN) to allow any phone in the world to be dialed.

History of mobile phones covers mobile communication devices which connect wirelessly to the public switched telephone network

The history of mobile phones covers mobile communication devices that connect wirelessly to the public switched telephone network.

A mobile phone operator, wireless provider, or carrier is a mobile telecommunications company that provides wireless Internet GSM services for mobile device users. The operator gives a SIM card to the customer who inserts it into the mobile device to gain access to the service.

CT2 is a cordless telephony standard that was used in the early 1990s to provide short-range proto-mobile phone service in some countries in Europe. It is considered the precursor to the more successful DECT system. CT2 was also referred to by its marketing name, Telepoint.

DOCOMO PACIFIC is a wholly owned subsidiary of predominant mobile phone operator in Japan, NTT DOCOMO. With combined offerings to include the latest mobile services, television, internet and telephone services, DOCOMO PACIFIC is the largest provider of telecommunications and entertainment services serving Guam and the Northern Mariana Islands, as well as the military installations in the area.


The Radio Telephone Network C, was a first generation analog cellular phone system deployed and operated in Germany by DeTeMobil. It utilized the C450 standard and was the third and last update of a series of analog mobile phone systems used primarily within Germany, superseding the B-Netz and the A-Netz before it. It has been decommissioned, replaced by both the newer D-Netz (GSM-900) and E-Netz (GSM-1800) systems.

Mobile Telecommunication Company of Iran Iranian telecommunications company

Mobile Telecommunication Company of Iran, commonly abbreviated as MCI and also known under its brand name Hamrahe Aval, 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. It provides roaming services via 271 partner operators in more than 112 countries.

Jesse Eugene Russell is an African American inventor. Trained as an electrical engineer at Tennessee State University and Stanford University, and working in the field of wireless communication for over 20 years, Russell has helped to shape the wireless communications industry direction through his leadership and perspectives for standards, technologies as well as new wireless service concepts.

Mobile phone industry in Japan

The Japanese mobile phone industry is one of the most advanced in the world. As of July 31, 2013 there were 139,180,300 mobile phones in use in Japan. This is 110 percent of Japan's total population according to the Ministry of Internal Affairs and Communications.

Cellular frequencies are the sets of frequency ranges within the ultra high frequency band that have been assigned for cellular-compatible mobile devices, such as mobile phones, to connect to cellular networks. Most mobile networks worldwide use portions of the radio frequency spectrum, allocated to the mobile service, for the transmission and reception of their signals. The particular bands may also be shared with other radiocommunication services, e.g. broadcasting service, and fixed service operation.


  1. "AMTA". amta.org.au. Archived from the original on 17 April 2008.
  2. 1 2 "Answers - The Most Trusted Place for Answering Life's Questions". Answers.com.
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