2G/EDGE

2G/Edge is 2nd generation  telecommunication system development. R21 – During the 1980s, the European Conference of Postal and Telecommunications Administrations Radio communications Working Group and its frequency sub-working group R21 succeeded to have mobile services included at 900 MHz in the international frequency allocations table.  

3G

3G is 3rd generation Telecommunication system development.The 3G network was first launched by Japan’s NTT DoCoMo in 2001. The revolution continues when the 3G network is present in the community. No longer only limited to SMS, even the MMS era has begun to be forgotten, new services have emerged such as video conferencing, video streaming, voice over IP / VoIP.

4G

The earliest phases of what became known as 4G started in 2008 as the International Mobile Telecommunications-Advanced specification. In 2008, no mobile network or cellular carrier was able to achieve the 100 Mbps speed that 4G specified, though there were competing approaches, including LTE and WiMAX , which aimed to bridge the gap between 3G and 4G.

5G

5G is a 5th  generation Telecommunication system that promises download and upload speeds of data 10 to 20 times faster than the internet speed of the previous generation. In practice, the emergence of 5G technology is intended to provide convenience to users in terms of data speeds, low latency, wide network connections and higher network capacity.

soruce : wikipedia