Big Hint: Implement 4G First!
FACT: The world has NOT yet implemented the actual, real, published 4G standard yet!
Considering this shameful fact, why is anyone bothering with 5G? It's good marketing hype! That's the same reason we have a FAKE '4G', actual 3G standard running across the world at this point in time. It was good marketing hype to call what is actually high end 3G '4G'. This is what Marketing Morons do for a living.