The instructions which I modified is as follows:
- Install the linux-backports-modules-generic package and gnome-phone-manager (for sending and receiving SMS).
- Plug in your Tattoo Huawai USB modem.
- Right click NetworkManage, select Edit Connections.
- At the "Mobile Broadband" tab, select Add. The wizard to set up a mobile broadband connection appears.
The Phone Manager can be found in Applications-->System Tools. Don't expect a dialog box to appear. Instead an icon in the menu bar should appear. It would probably have a red zero with slash, which means it is unable to connect to the phone. Right click on the icon and select Preferences. A dialogue box will appear, Click on the "Connection" tab. Select "Other port" and cycle through any one of the following that will work:
If everything is set up correctly you should see a phone icon near the globe network connection icon in your menu bar.
To send SMS click on the phone icon, ex. type 222 in Recipient and BAL in the Message text box to query your balance.
A problem with Phone Manager is that it does not seem to have any access to the phone address.
A more serious problem that I have noticed is that when you have an existing mobile broadband setting (e.g. Globe Telecome Internet) and the usb modem is unplugged, xserver seems to become unstable. There are random artifacts of black rectangles appearing on my screen (usually on top of the menu bar) and I am randomly logged out of the xserver. I'm using Ubuntu amd64, gnome, and an nvidia graphics card. Deleting the mobile broadband connection setting restabilize the system. I'm still studying this but I have not reported a bug yet, if you've experienced the same please confirm and report it.