The generations of mobile networks are as follows.
1. First Generation(lG) 1981- NMT launch
2. Second Generation(2G) 1991-GSM Launch
3. Second to Third Generation Bridge (2.5)2000 – GPRS launch ,
4. Third Generation( 3G) 2003- UK 3G launch
5. Fourth Generation (4G) 2007
6. Fifth Generation (5G) 2019+