Apsattv:
3750 looks out of band isn't 5G only allocated 200 mhz 3.4 to 3.6GHZ
3.7 to 4.2 is for Cband satellite.
3.4 to 3.6 is extended cband satellite
There is quite a fight going in the u.s over spectrum allocation.
These are temporary allocations for testing purposes so fall outside the current 3.5GHz allocations.
Currently 3.5GHz allocations are FDD only from 3.41 - 3.487 and 3.51 - 3.587, Inmarsat have 3.589 - 3.639 and the 3.639 - 3.69 block is currently unallocated.
It's likely the 3.41 - 3.69 block will ultimately be the actual block that is auctioned off in NZ. Some countries in the EU may allocate up to 3.8, and some as low as 3.3 with 3.3 - 3.8 covering the entire n78/c band 5G band with devices supporting this entire band.