1g was launched by Nippon Telegraph and Telephone in Tokyo
The US approved the first 1G operations
2G was launched under the GSM standard in Finland
3G was launched by NTT DoCoMo in 2001
the Blackberry was launched, and many of the features were made possible by 3G connectivity.
The launch of the iPhone that also used 3G
4G was first deployed in Stockholm, Sweden and Oslo, Norway
Three South Korean carriers – KT, LG Uplus and SK Telecom – rolled out live commercial 5G services last December and promise a simultaneous March 2019 launch of 5G across the country