Custom Nerves system config for vintage_net_mobile?

Does anyone have a working nerves system image for a Huawei E3372 cell modem?

I’ve tried building a custom system for the rpi0, and following everything in the instructions, and even adding a few kernel configs that seemed, relevant, but still don’t have anything new show up when I connect the cell modem, nothing in /dev, nothing in ifconfig.

Any ideas?