Mobile Network Operators (MNOs) are embarking on a phased deployment of 5G. Commercial launches of 5G for mobility have begun among early adopters, and these were preceded by pre-standard Fixed Wireless Access (FWA) offerings. While there are many new and exciting applications and use cases 5G technology will enable, it will take time to realize its full potential. As with any major new build, the foundation must come first. This paper discusses how to build that foundation and what it must be capable of supporting.