I just tried switching to the qmi_wwan driver and tried all the possible USB network card modes. The kernel was modified according to the Quectel_WCDMA_LTE_Linux_USB_Driver_User_Guide.pdf version 1.3 for a v4.4.189 kernel. It seems like quectel-CM only works in NDIS/RMNET mode. I’m basically trying to do the same thing as this post. I’d imagine this is quite a common use-case, it shouldn’t be this difficult to set it up, right?
Also I realized I forgot to provide this info earlier but my EC25’s revision is EC25EFAR06A09M4G