2G and 3G Mobile Networks

         First generation of cellular networks called 1G started in early 1980s. It consisted of analog systems capable of carrying only voice.

         In 1990s, second generation networks (2G) started.2G network supported voice as well as data transmission. 2G introduced a variety of new features such as push-to-talk, SMS, conference calling, caller ID, voicemail ,email messaging and Web browsing.

          Third generation networks (3G), are newer cellular networks that have data rates of 384kbit/s and more. As a result 3Gs can support more demanding multimedia applications, videos and also faster browsing and data transfers and downloads.The main difference between 2G and 3G networks is faster data speeds offered by 3G.

Fourth generation networks (4G) which started recently supports speeds upto 100mbps to 1 gbps.