Hello Antti, I had the same problem, on my case NetworkManager was selecting a random device from the 4 devices recognized from my Vodafone 3G PCMCIA Card. I was directed to the following wiki page: <a href="https://wiki.ubuntu.com/DebuggingModemmanager">https://wiki.ubuntu.com/DebuggingModemmanager</a> Fortunately on my case the problem is already fixed on the daily trunk, anyway I would like to understand how it works to isolate the fix and backport to the stable version. I was investigation my problem based on HAL information (lshal, 10-modem.fdi) from looking into similar bug reports, after looking at the modemmanager source I have found I was looking at the wrong place since udev is now used replacing HAL. From mm-manager.c I have found that mm scans/handles devices with subsystem "tty" and "net" . You can get a list of the currently detected udev devices with: udevadm info --export-db Now. I need to find where is the modem date retrieved from I guess there is an equivalent to hal-info with the modem information. Hope it helps. <div class="gmail_quote">On Sun, Dec 13, 2009 at 7:18 PM, Antti Turunen <<a href="mailto:antti.turunen@siptune.fi">antti.turunen@siptune.fi</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div text="#000000" bgcolor="#ffffff"> Hello all, we know there is many 3G modems not yet properly recognized and/or connected by modem/network managers in 9.10. I have been searching around for information how the whole new modem-manager thing goes, but I have not been able to find much. Could someone tell if there is info somewhere about modem-manager plugins, different modem-modeswitch options etc? I am not a SW developer, but would like to try some tailoring for certain problematic modem models. Thanks in advance, Anttu </div> -- Ubuntu-devel-discuss mailing list <a href="mailto:Ubuntu-devel-discuss@lists.ubuntu.com">Ubuntu-devel-discuss@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss</a> </blockquote></div> -- João Luís Marques Pinto GetDeb Team Leader <a href="http://www.getdeb.net">http://www.getdeb.net</a> <a href="http://blog.getdeb.net">http://blog.getdeb.net</a>