This document provides an overview of the evolution of wireless network technologies from 1G to 5G. It discusses the key features and limitations of each generation of technology. 1G allowed analog voice calls, while 2G introduced digital cellular networks and text messaging. 2.5G enhanced 2G with features like email and basic web browsing. 3G enabled multimedia and higher speeds, and 4G further increased speeds for video calling and mobile internet. 5G is expected to offer speeds over 1Gbps for applications requiring low latency like autonomous driving. The document compares the various technologies and how mobile phones have developed with each generation.