4G technology provides faster wireless speeds compared to previous generations. It is projected to offer speeds up to 100Mbps for mobile use and 1Gbps for stationary use. 4G networks use fully packet-switched connections optimized for data transfer. They allow applications like virtual presence, education, gaming and broadband access in remote areas without infrastructure. 4G is an ongoing area of research and development, with 5G networks now being explored as the next generation of mobile technology beyond 4G.