also: にジー
2G; second generation (wireless technology)
Telecommunications term for the second generation of cellular network technology, such as GSM and PDC. Often contrasted with 3G, 4G, and 5G.
This old mobile phone only supports 2G.
2G networks have already been shut down in many countries.
Abbreviation of English 'second generation', written as 2G and read as ツージー (from English 'two G') or にジー (using the Japanese numeral に).