I suffer from the same issue. Thank you for this thread.
I spent only €45 to this project. It is not completely wasted money but I am not happy that I cannot use it according to my plan.
I will check back if I find something. Thank you all.

but it disconnects moment later, maybe because of not enough power for the dongle from your usb port, maybe because pfsense doesn't like the ethernet device that was created.. That it didn't disconnect when you switched it into 12d1:155e indicates that it is pfsense's driver not being happy with th...

Try instead with -H which is Huawei-mode or -J which is Huawei-new-mode. -X is Huawei-altmode and that will not give you an ethernet device with a protocol that pfsense/freebsd have drivers for. Do I make it well? It looks like I do not understand something. Correct me if I am wrong but the usb_mod...

Hello, I am new in the topic and I need to ask because I cannot understand something. I installed pfsense on a physical machine. pfsense works well. When I plug my E3372h-320 lsusb shows that it tells about itslef it is a 12d1:1f01 and tells that it is a Mass Storage. It does not act as an ethernet ...