4G smart phones and the 4G network has been in development for some over a decade. The official launch of the 4G network and compatible 4G smart phones is yet to be confirmed but we're hoping it's going to be sometime in 2011 in the UK. Talk of there being a 5G network is just talk. There maybe developments in the Far East Countries like Korea and Japan but the technology is far from being developed at a commercial level globally. 4G networks will be here for at least the next 10 years before the next phase in upgrading data capacity. See the Wiki information on 4G networks and smart phone carriers. http://en.wikipedia.org/wiki/4G