What is 3G in telecommunication?

There are three major parts to a 3G mobile network:

The main feature of 3G technology is that it supports greater voice and data capacity and high data transmission at low-cost . 3G mobiles can operate on 2G and 3G technologies.

3G is the third generation of wireless mobile telecommunications technology . It was the upgrade over 2G, 2.5G, GPRS and 2.75G EDGE networks, offering faster data transfer, and better voice quality. This network was superseded by 4G, and later on 5G.