2G refers to the second generation of mobile networks based on GSM . The radio signals used by the 1G network were analog, while 2G networks were digital. 2G capabilities were achieved by allowing multiple users on a single channel via multiplexing. During 2G, cellular phones were used for data along with voice.
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The G in 2G, 3G and 4G stands for Generation , and they refer 2nd, 3rd and 4th generation of wireless technology. The newer generation is faster, more secure and more reliable. 1G was offered in analog technology (AMPS), and since 2G signals are transmitted in digital format in GSM and CDMA technologies.
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