Hi,
I've experimented with Huawei ME909s-120 mPCIE card (EU version), and got it working by just adding device ID:s to the kernel u3g module. The changes are:
sys/dev/usb/serial/u3g.c:
@@ -317,6 +317,7 @@ static const STRUCT_USB_HOST_ID u3g_devs[] = {
U3G_DEV(HUAWEI, E392...
