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1g was launched by Nippon Telegraph and Telephone in Tokyo
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The US approved the first 1G operations
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2G was launched under the GSM standard in Finland
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3G was launched by NTT DoCoMo in 2001
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the Blackberry was launched, and many of the features were made possible by 3G connectivity.
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The launch of the iPhone that also used 3G
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4G was first deployed in Stockholm, Sweden and Oslo, Norway
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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