The fifth generation (5G) of wireless communications technology is fundamentally transforming the elecommunications industry. The evolution of wireless data applications and the increasing popularity of smart devices have led to a massive proliferation of mobile data traffic, creating challenges and opportunities for mobile service providers. 5G is expected to enable further economic growth and digitization of a connected society of people and all possible things. 5G is gearing up to enable new use cases such as smart cities, smart agriculture, smart grids, energy, smart manufacturing, autonomous driving, logistics, public safety and numerous other verticals. New network requirements are on the rise due to the anticipated massive growth in connected devices and substantial increase in the data traffic in the near future. However, the daunting challenge to reach these heights and which has always been the case with mobile communications is the availability of useful and applicable spectrum.