Network

2G Network

2G Network, first introduced in 1992. It’s the 2nd Generation mobile data communication technology and the first to use digital encryption of conversations. 2G Network introduces to CDMA & GSM technology. It was the first to offer data services and SMS text messaging, but their data transfer rates are lower than those of their successors. It is the oldest among 2nd, 3rd & 4th generation.

3G Network

3G networks succeed 2G ones. Because it give us  faster data transfer rates and are the first to enable video calls. 3G Network is the 3rd Generation mobile data communication technology by UMTS networking including all bands of HSDPA and CDMA2000. This makes them especially suitable for use in modern smartphones. In 3G Network you can see TV.

4G Network

4G  is the latest 4th Generation mobile data communication technology (LTE networks). 4G Network is a successor of the 3G and provides ultra-broadband internet access for mobile devices. It has the maximum data transferring capability (100Mbps and more!) It is still not available in a lot of the parts in the world in mobile telecommunication.4G Network  also includes Mobile WiMAX networks

Bangladesh

2G capabilities	GSM 900, GSM 1800
3G capabilities	UMTS 2100
4G capabilities

India

2G capabilities	GSM 900, GSM 1800
3G capabilities	UMTS 2100
4G capabilities	LTE 2300

Pakistan

2G capabilities	GSM 900, GSM 1800
3G capabilities
4G capabilities