1G refers to the first generation of wireless cellular technology (mobile telecommunications).
1Gfirst generationfirst-generationmobile telephony serviceAnalog Networks

Cellular network

cellular networkcellularmobile network
1G refers to the first generation of wireless cellular technology (mobile telecommunications).
The first commercially cellular network, the 1G generation, was launched in Japan by Nippon Telegraph and Telephone (NTT) in 1979, initially in the metropolitan area of Tokyo.

2G

2G2.5G2.75G
These are the analog telecommunications standards that were introduced in the 1980s and continued until being replaced by 2G digital telecommunications.
After 2G was launched, the previous mobile wireless network systems were retroactively dubbed 1G.

C-Netz

C-Net C450C-4501G cell phones (C-Netz)
Others include Advanced Mobile Phone System (AMPS) used in North America and Australia, 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.
The Radio Telephone Network C (German: Funktelefonnetz-C, abbreviated as C-Netz), was a first generation analog cellular phone system deployed and operated in Germany (at first West Germany) by DeTeMobil (formerly of Deutsche Bundespost Telekom, currently Deutsche Telekom).

Nordic Mobile Telephone

NMTNMT-450NMT 450
One such standard is Nordic Mobile Telephone (NMT), used in Nordic countries, Switzerland, the Netherlands, Eastern Europe and Russia.
NMT is based on analogue technology (first generation or 1G) and two variants exist: NMT-450 and NMT-900.

Wireless

wirelesswireless communicationwireless internet
1G refers to the first generation of wireless cellular technology (mobile telecommunications).

3G

3G3G networkthird generation
A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1979 and the early to mid-1980s.

List of mobile phone generations

generationcellular mobile communications7G
A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1981/1982.

Mobile radio telephone

mobile radio telephone0Gmanual mobile telephone system
The antecedent to 1G technology is the mobile radio telephone, or 0G.

Mobile phone industry in the United States

American
* In 1983, Ameritech launched the first generation mobile phone service (1G) in Chicago.

GSM

GSMGSM (850/900/1800/1900) GSM/GPRS/EDGE
2G networks developed as a replacement for first generation (1G) analog cellular networks, and the GSM standard originally described a digital, circuit-switched network optimized for full duplex voice telephony.

Digital AMPS

TDMAD-AMPSANSI-136
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 AMPS.

Comparison of mobile phone standards

mobile phone standardscomparison of mobile phone standardsstandards
A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1979 and the early to mid-1980s.

List of Nokia products

Ultrabasic16506080
These all use 1G networks.

1G (disambiguation)

1G (disambiguation)
1G is the first-generation wireless telephone technology.

List of BlackBerry products

Aurora
They were built for use with two 1G data-only packet switched networks: Mobitex and DataTAC.

Telus Mobility

TelusTelus MobilityTelus (CA)
In 1983, AGT Mobility was formed by Alberta Government Telephones (the predecessor to Telus) to provide a 1G analogue mobile network for Alberta's natural resources industries.

Mobile telephony

mobile telephonymobile communicationmobile communications
The first fully automatic first generation cellular system was the Nordic Mobile Telephone (NMT) system, simultaneously launched in 1981 in Denmark, Finland, Norway and Sweden.

Mobile phone

mobile phonecell phonemobile
These first-generation (1G) systems could support far more simultaneous calls but still used analog cellular technology.

Paktel

Paktel offered only mobile telephony service to its 2 million subscriber base.

History of Nokia

Mobira developed mobile phones for the Nordic Mobile Telephone (NMT) network, called the "1G" and was the first fully automatic cellular phone system.

Mobile technology

mobile technologymobile technologiesmobile
In the early 1980s, 1G was introduced as voice-only communication via "brick phones".

Channel access method

channel access methodmultiple accessmultiple access method
An example of FDMA systems were the first-generation 1G cell-phone systems, where each phone call was assigned to a specific uplink frequency channel, and another downlink frequency channel.

ALOHAnet

Alohaslotted ALOHAALOHA protocol
ALOHA channels were used in a limited way in the 1980s in 1G mobile phones for signaling and control purposes.