The 2nd generation was introduced in late 1990’s.
Digital technology is used in 2nd generation mobile tele-
phones. Global Systems for Mobile communications (GSM)
was the first 2nd generation system, chiefly used for voice
communication and having a data rate up to 64kbps.
2G mobile handset battery lasts longer because of the radio
signals having low power. It also provides services like Short
Message Service (SMS) and e-mail. Vital eminent technolo-
gies were GSM, Code Division Multiple Access (CDMA),
and IS-95 [3], [7].