Huawei E3276s-150 (Swisscom branded - 12d1:1597) LTE stick with Linux
This works for me:
usb_modeswitch -W -c 12d1:156a -v 12d1 -p 1597(after having unpacked /usr/share/usb_modeswitch/configPack.tar.gz to a temporary directory)
Update 2016-01-19: back in 2014 I reported this to the maintainers of various "modeswitch databases", and it seems it's made it's way into the Debian/Ubuntu version at least, according to the changelog (version 20151101-1).