1G Cellular Network
Launched by Nippon Telegraph and Telephone in 1979, 1G was first introduced to the citizens of Tokyo.
2G Cellular Network
2G was launched in Finland during 1991.
3G Cellular Network
First 3G Network was launched in Japan by NTT DoCoMo.
4G Cellular Network
First 4G Network was launched in Norway in 2009.
5G Cellular Network
South Korea was the first country to offer 5G in March 2019.