Starting with a return to the first half of the 20th century, we set the focus on early mobile networks and devices that were then just beginning to be introduced into commercial society by the increasingly rapid development of the telecommunications industry. We come to the 1G network, which was revolutionary in its time, but today its shortcomings are only clearly visible, the signal coverage was the same as the sound quality. Roaming support did not meet those signals that were exposed to eavesdropping due to non-existent call encryption, while the data transfer rate was around a miserable 2.4 kbps. According to internet sources, only Russia still uses the 1G mobile network. The next generation network, 2G - GSM brings major changes such as increased speed, improved sound and availability. The biggest difference is that the 2G network is starting to use digital signals instead of the first generation analog ones. Functionalities such as SMS and MMS are presented. Within the 3G network, they support data transfer that is 4 times larger than with 2G and can transfer 2Mbps. With this generation comes the ability to surf the internet, watch videos and listen to music on your mobile. The first smart mobile devices appear, which were much more advanced and with more built-in functionalities than the previous generation mobile phones. 4G - LTE mobile networks started with the evolution of 3G networks because the speed required for 4G networks was not yet possible, so some transitional networks were already marked with this label if there are certain advantages over the previous generation network. As the world is exposed to constant change and innovation within the technology field, the beginning of an even faster and more comprehensive network is inevitable given the number of mobile devices used worldwide today, and that is exactly what the 5G network provides. In order to understand 5G at the required level, it is necessary to start with technology that offers changes to network components to make boring unimaginable data transfer speeds. The 5G network is conceived as a major driver of the fourth industrial revolution, which will be achieved by connecting all possible devices that have the ability to use the Internet to provide people with functionalities that allow us control and security in forms, which didn’t exist by now.