The problem was solved with the update of the Arch Linux package usb_modeswitch-2.4.0-2-x86_64.pkg.tar.xz . The problem in the packaging, which lead to a non-functional systemd/udev setup concerning usb_modeswitch, was resolved (see here ). Everything seems to work fine again. So thanks once more US...

So my Arch Linux computer (amd64 / desktop / Linux kernel 4.6.4) has the same problem as the Raspberry Pi: [ 76.441022] usb 1-1.2.2: new high-speed USB device number 6 using ehci-pci [ 76.600475] usb-storage 1-1.2.2:1.0: USB Mass Storage device detected [ 76.600612] scsi host10: usb-storage 1-1.2.2:...

On a Debian 8 desktop computer (amd64), I didn't have the problem before/after upgrading from the shipped package version 2.2.0 ("2.2.0+repack0-2") to the backported package version 2.4.0 ("2.4.0+repack0-1~bpo8+1"). I will try later with an Arch Linux based desktop computer. I'll...

edit: The problem is solved. It was a packaging problem in Arch Linux which appeared in usb_modeswitch-2.4.0-1 and was fixed in usb_modeswitch-2.4.0-2. ----------- original post: I'm using a Huawei E3372 LTE Modem (exact model: E3372h-153) with a Raspberry Pi 3 running Arch Linux ARM. It worked fin...