Comment 3 for bug 450997

My instructions for 9.04 (2.6.28) should still be relevant -
http://www.up-stream.co.uk/wwanhspamobile-broadband/option-icon-505-under-ubuntu-9-04

We have a few problems here. I've not tested 9.10 personally, but to be honest I'm not overly confident about the hso driver currently in Kernels .31 and above. I had tremendous issues with .31 at least and didn't see a changelog that leads me to believe .32 has made a difference. Using younger kernels is advantageous with this adapter because it is then possible to compile the driver over at Pharscape.

Remember you don't want the CD partition to mount. If it does, then the modem will never be detected. Install Ozerocdoff and set the appropriate udev rules to allow the device to be picked up as a modem. Do not use usb_modeswitch for Option devices like this.