Any new technology can satiate the consumers for a small span of time only. It cannot long last as the consumers demand more from their exiting technology. Whatever is the device, the latest technology must have some new features. With the advent of the Internet, the most wanted feature is Better, Faster access to information. The time not far away when people will control all personal equipment from one’s hand. To support such a powerful system, we need very high-speed wireless connectivity. 4G technology is the outcome in this direction. 4G is the next generation of wireless networks that will replace 3G networks and supposed to provide with better speed and all IP based services. Where there is a great requirement of integrating all technologies into a single combined system, 4G promises a solution to this problem by seamlessly integrating the terminals, networks and applications.