Till, let me help you a bit to finally engage latest USB_ModeSwitch and data package in Fedora 21. - Refer to proper usb_modeswitch-data version https://bugzilla.redhat.com/show_bug.cgi?id=1169234 - Add missed REFERENCE file & refer to proper usb_modeswitch version https://bugzilla.redhat.com/show_bug.cgi?id=1169235 poma