Hi,
I have found the following problem with an
Ericsson F5521gw 3G modem:
1. start system
2. bring up 3g connection by clicking on
the configureation in nm-applet
3. wait until connection is established
and can be used
4. disconnect from 3g connection
5. when trying to bring up the connection
again it fails
A workaround is to deaktivate mobile
broadband wait and activate mobile broadband again.