This document discusses the evolution of cellular network generations from 1G to 5G. 1G introduced analog cellular networks with data speeds up to 2.4 kbps. 2G brought digital networks using TDMA and CDMA with speeds up to 64 kbps. 3G enabled smartphones and multimedia with speeds up to 2 Mbps. 4G provided high-speed data and video calling using WiFi and WiMax. 5G is being developed to support data rates over 1 Gbps for applications requiring high bandwidth like virtual reality. It will use technologies like OFDM, beamforming and higher frequency bands. 5G aims to offer flexible global internet access with low latency and high reliability.