NR & LTE Band support of MR5100c

I'm now trying to use Nighthawk M5 MR5100C on South Korea.

I know that this model is variant for Canada Bell carrier.

As I know, Bell has LTE bands on B2, 4, 5, 7, 12, 13, 17, 29 and 5G bands on n66.

However, product data sheet shows that it is also capable of connecting to various bands listed above.

Is this device really support N77 and N78?

Currently I cannot connect to 5G NSA network (n78) with this device.

Also, what is supported LTE band combinations (CA) on this device?

Currently I can only use LTE B5+7 combination instead of B1+3+5+7.

I think more detailed information should be provided.

Advertised "LTE CAT 20" is not capable without LTE-CA.