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 true multimedia phones and up to 2 Mbps speeds. 4G provided high-speed data and streaming video using WiFi and WiMax. 5G is being developed to support data rates over 1 Gbps for applications like virtual reality through technologies like OFDM and millimeter wave wireless. 5G aims to offer high-quality global access to support the growing internet of things.