In the past year, wireless technology makes tremendous growth. Evolution and revolution of wireless technology is reached at 7.5G. Wireless technology FG (Future Generation) mobile communications will have higher data transmission rates than 6G and 7G. Wireless technology is continuously one of the hottest areas that are developing at a high speed, with advanced techniques emerging in all the fields of mobile and wireless communications. Current times are just the beginning for deploying 5G mobile communication systems. At present we have many technologies each capable of performing functions like supporting voice traffic using Voice Over IP (VoIP), broadband data access in mobile environment etc., but there is a great need of deploying such technologies that can integrate all these systems into a single unified system. 8G presents a solution of this problem as it is all about seamlessly integrating the terminals, networks and applications. In this short book an attempt has been made to provide a study of different cellular technologies namely 4G, 5G, 6G, 7G, and FG respectively, and a detailed comparison among them.