As of November 2010, Worldwide Interoperability for Microwave Access (WiMAX) and 3GPP Long Term Evolution (LTE) are marketed as 4G networks and are considered by the International Telecommunications Union (ITU) as candidate technologies for 4G. High Speed Packet Access (HSPA+) networks are also marketed in the US as a 4G network though it is not recognized by the ITU.
Pure Data Network
The current 3G mobile network handle both voice and data separately. One of the most significant changes to the 4G network is that is a data network, transferring Internet Protocol (IP) data packets. A completely data based network will allow for more bandwidth which means more data can be passed through the network.