5G's biggest challenge is making sure it actually works as promised

5G, 5G, 5 gee.
To most people, 5G is merely the successor to 4G LTE — the next generation of cellular connectivity for your phone. 
And yes, that's what 5G will be for most people as carriers worldwide begin deploying the high-speed wireless connectivity starting in 2019.
But that's also a serious mischaracterization of 5G because it isn't just faster cellular service that'll enable you to stream high-resolution videos, games, and VR. 
5G is virtually a complete overhaul of conne