The advance of wireless technologies has led to the design, development and deployment of different types of wireless networks. These networks are usually classified by their capabilities and properties. Based on their characteristics, wireless network technologies can be used for specific applications. The future of mobile wireless communication networks will include existing 3rd generation, 4th generation, Current research in mobile wireless technology concentrates on advance implementation of 4G technology and 5G technology. In 5G researches are being made on development of World Wide Wireless Web (WWWW), Dynamic Adhoc Wireless Networks (DAWN) and Real Wireless World 5th generation (based on cognitive radio which implies the whole wireless world interconnection & WISDOM – Wireless innovative System for Dynamic Operating Mega communications concept), 6th generation (with very high data rates Quality of Service (QoS) and service applications) and 7th generation (with space roaming). This paper is focused on the specifications and applications of wireless communications network generations.