Comment 4 for bug 1650792

I see that in
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/964705
the "Cancel" workaround was used already. Sorry.

However I should add, that with my Ubuntu 16.04.1 I had also to add a new file
/lib/udev/rules.d/70-usb-modeswitch.rules
to get networking with my Aldi/Medion Mobile Huawei E173:

# own udev rules for Aldi/Medion Huawei E173
ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="1446", RUN+="/usr/sbin/usb_modeswitch -v 12d1 -p 1446 -M '55534243123456780000000000000011062000000100000000000000000000'"
ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="1436", RUN+="/bin/bash -c 'modprobe option && echo 12d1 1436 > /sys/bus/usb-serial/drivers/option1/new_id'"

(Modified from https://wiki.ubuntuusers.de/USB_ModeSwitch/). Probably nother 16.04 bug.