Fedora 17 and Ubuntu Unity has Gnome-Control-Center 3.4 and modems work fine on those distros. This suggests that the issue is not down to the version of Gnome-Control-Center that is used.
Stefan - did you try running nm-connection-editor?
Fedora 17 and Ubuntu Unity has Gnome-Control- Center 3.4 and modems work fine on those distros. This suggests that the issue is not down to the version of Gnome-Control- Center that is used.
Stefan - did you try running nm-connection- editor?