"Step by Step guide to use Huawei E1550 USB stick on Ubuntu:
1. Plug in Huawei E1550 USB modem to USB port. You can notice its icon is loaded on Desktop.
2. Type following command at command prompt:
$ gksu gedit /etc/udev/rules.d/15-huawei-e1550.rules
3. It will open gedit. Type following lines in it and then save it and close the file.
SUBSYSTEM=="usb",
SYSFS{idProduct}=="1446",
SYSFS{idVendor}=="12d1",
RUN+="/lib/udev/modem-modeswitch --vendor 0x12d1 --product 0x1446 --type option-zerocd"
4. Restart the computer. After restart click on "Network connection" icon in the top panel. You will see new menu item under "Mobile Broadband" category.
5. Click on that new entry. It will open a New Mobile Broadband Connections dialog. Click Forward to continue.
6. Select you country and click Forward. Then select service provider from the list and click forward. Then choose your Billing plan and click Forward. Then finally Click on Apply to save setting.
"
