The 1G period began in the late 1970s and lasted through the 1980s. These systems featured the first true mobile phone systems, known at first as "cellular mobile radio telephone." These networks used analogue voice signaling, and were little more sophisticated than repeater networks used by amateur radio operators.

First-generation wireless networks were targeted primarily at voice and data communications occurring at low data rates

One such standard is NMT (Nordic Mobile Telephone), used in Nordic countries, Eastern Europe and Russia. Others include AMPS (Advanced Mobile Phone System) used in the United States, TACS (Total Access Communications System) in the United Kingdom, C-Netz in West Germany, Radiocom 2000 in France, and RTMI in Italy.

Key Points :

1. Circuit switched
2. Started in Norway 1980
3. Only for Voice transmission
4. Analog