4G means “fourth generation” wireless network standard, coming after 2G (“second generation”) and 3G (“third generation”). 4G networks are huge leap from past networks in that they are all-IP networks, and much faster than predecessors with download speeds of up to 100 to 128 Megabits/second. For you, 4G networks will enable seamless service and access to faster and higher quality voice and data, as well as high definition video.
4G networks are currently being rolled out globally in the formed of 4G LTE, the next-generation wireless broadband network. According to the Global mobile Suppliers Association (GSA), 455 million people today have access to commercial LTE networks. 1113 LTE operators have launched commercial services with 308 operators publicly committed to the technology across 94 different countries. Amongst the LTE operators are Verizon Wireless, AT&T, T-Mobile and MetroPCS. See the full list at http://lteworld.org/operator.