Netgear Fuse 779s LTE Hotspot - Sprint (USA)

Wondering if anyone has connected a Netgear Fuse 779s hotspot over USB as an LTE or PPP adapter. I realize it’s not on the hardware compatibility list. The Netgear Fuse is a fairly common hotspot adapter for carrier Sprint in the US. As of 6.38 it shows up as a USB device, but ‘unknown’ under PPP and nothing under LTE.

It’s a model related to the Netgear 770s Unite on carrier AT&T, which doesn’t appear to work either.

Official USB support for this and the Sprint Franklin R850 hotspot adapters would be great, making Sprint a more practical option for LTE failover.