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Hmmm, It will. If 800MHz bandwidth is considered UWB

Think video delivery kiosk - I'd like to rent a movie please or I'd like today's daily news videos/VR. Downloaded in 3 secs from a vending machine?

UWB is very low power, with a large number of pulses of very low amplitude typically below the noise level, over a large bandwidth (minimum 500 MHz).

It's not just the bandwidth. UWB has a peak power density limit of −41.3 dBm/MHz. 5G is 55 dBm.

Note the many, many, many orders of magnitude difference...