Comment 14 for bug 796871

The blacklist lines in the udev rules '77-mm-qdl-device-blacklist' are to prevent modem-manager grabbing the port before the firmware is loaded. The firmware is loaded through a serial port on /dev/ttyUSB0. Once the firmware is correctly loaded a new port will open up on /dev/ttyUSB1.

The problem seems to be that the firmware is not loaded.

To the original poster: Check that you have 'qcserial' and 'gobi-loader' installed. You will also need the firmware files from a Windows install. If you Google around for 'gobi 2000 linux' you will find a number of instructions. It's a bit fiddly...