What is 2G or Second Generation Telecommunication Networks? - Explained

What is 2G or Second Generation Telecommunication Networks? - Explained

Image of 2G cellular Phones by Internet

Zero Generation and the First Generation (1G) mobile radio networks didn't really made up advancements what expected by the users. Due to that the researching kept going. By 1991 the second generation cellular technology came into live.

Why 2nd Generation?

It's a true fact that the Zero Generation (0G) and the First Generation (1G) mobile telecommunication technology didn't met the expectation from the users. The cost was higher, the prices were higher and the voice wasn't clear like the wired telecommunication platforms.

The second generation cellular technology has became the hope by the time. Global System for Mobile Communications Association developed the 2nd generation cellular telecommunication networks into the world. 

The 2nd generation cellular telecommunication network or the 2G network also started to known as GSM network after the launch.


The technology itself which used in the 2G or the second generation cellular networks, are digital signals. Unlike the analog signals which used in the zero generation and the first generation cellular networks.

By using the digital signals to broadcast and receive data, the 2nd generation cellular networks got the capability to distribute the 8 channels in the same frequency bands. Which means it's possible to have 8 telecommunication distributors or network providers to provide cellular networks.

Frequency BandsMaximum Transmission Power From Handset
GSM900 MHz1800 MHz1 Watt
GSM850 MHz1900 MHz2 Watts
GSM400 MHz450 MHzN/A


Because of the technology advancement which is from the base station and to the handset, the size of the phone got smaller even by the first generation mobile radio networks.

The energy transmission cost got cheaper and efficient with the second generation cellular networks.

Due to the capability of operating 8 bands in the same frequency levels, the opportunity to cater 8 different networks got broader and the monopoly in the cellular market got broken.

Due to the digital signal transmission, the data quality got increased and the speed of data transmission got increased.

Fully duplex communication enabled with the second generation cellular networks.


The cost of transmitting and receiving signals, and connecting the devices with the core network got cheaper than zero generation telecommunication networks and as well as 1G or first generation mobile radio connectivity. Because of that the charging for the calls got cheaper.

The devices itself because of the technology got cheaper and smaller in size. Many components which were there inside of the handset in Zero Generation and First Generation networks got removed and embedded with digital components.