5G is the name given to the next generation of mobile data networks. It will be much faster than the current 4G/LTE networks we use with our iPhones today. That speed may lead to other uses, such as as a replacement for home network options as well. The problem with 5G is that it doesn't have the range of 4G, so it will require more transmitters spaced closer together. Therefore, it may only be used in cities.