4G radio access technologies should be able to provide different types of IP services. These services rang from narrow-band to broadband, from non-real-time to real-time, and from unicast to multicast broadcast applications. When the need arises for different levels of user mobility the access systems are required with advanced capabilities of radio resource management and Quality of Service (QoS). We present, in this paper, the different QoS approaches by the various wireless and connectivity's networks as well as the issues that will face their implementations in 4G.