Short for second generation, 2G is a term used to denote the second generation of cellular phone technology established in 1991 under the GSM standard.
2G features
2G brought fully-digital features to what were previously analog cellular networks. These features included improved security, frequency spectrum efficiency, SMS (short message service) text messages, MMS (multimedia messages), and picture messages.
Cell phone, Computer abbreviations, Phone terms, Text messaging, Wireless
2G was also the first to employ PCS (personal communications services).
