In today’s world, wireless mobile communication plays a vital role in information exchange which demands high speed data transfers, users’ fast access to data, secure and reliable network protocols that too at low costs. Moreover, the ability to connect instantly and anywhere, made them more popular and successful. However, wireless is not a recent technology. Several wireless technologies are available with their own advantages and disadvantages. This paper presents a review of several generations which are being used viz. 0G, 1G, 2G, 3G, 4G and 5G, along with the future generations which are under research like 6G, 7G and 7.5G.