1) The document discusses the evolution of cellular mobile networks through 5 generations, from 1G analog networks to current 4G LTE networks and emerging 5G technologies. 2) Key technologies of 5G include using millimeter wave frequencies between 24-100GHz, massive MIMO antenna arrays, small cells to improve coverage, beamforming for directional transmissions, non-orthogonal multiple access, and mobile edge computing to reduce latency. 3) 5G is expected to deliver significantly higher speeds and capacities compared to 4G through these new technologies, and support new use cases for enhanced mobile broadband, ultra-reliable low-latency communications, and massive IoT/machine-to-machine communications.