Debian's usb-modeswitch_2.2.0+repack0-1_amd64.deb and usb-modeswitch-data_20140529-1_all.deb from https://packages.debian.org/sid/amd64/usb-modeswitch/download and https://packages.debian.org/sid/amd64/usb-modeswitch-data/download fixed it for me for Huawei E3531s - 2.
Debian's usb-modeswitch_ 2.2.0+repack0- 1_amd64. deb and usb-modeswitch- data_20140529- 1_all.deb from https:/ /packages. debian. org/sid/ amd64/usb- modeswitch/ download and https:/ /packages. debian. org/sid/ amd64/usb- modeswitch- data/download fixed it for me for Huawei E3531s - 2.