Please can you add the following rule for the HUAWEI E173u-2 to the /lib/udev/rules.d/40-usb_modeswitch.rules
ATTR{idVendor}=="12d1", ATTR{idProduct}=="1446", RUN+="usb_modeswitch '%b/%k' -H"
Re: HUAWEI E173u-2 working config
Can you give more details? Does the current version (data and program) not work in your system?