Using the UMTS/HSDPA Option Globetrotter GT M378 modem

As you will read, UMTS doesn't work out of the box, you need to struggle a bit.

Moreover, I didn't find a good support for it in Ubuntu forums, very often I had to ask on developers mailing list. If you have a problem, I suggest that you should look for help in this order:

  1. Ubuntu forum (
  2. Ubuntu Geek (,4.0.html)
  3. Launchpad (
  4. Gnome Network Manager mailing list (networkmanager-list at

In the following sections there are some problems I've found and solved during the years.