Find "Start & Quit"
Click Vodafone Mobile Broadband.

Click Preferences.

Click Start & Quit.

Select setting for automatic start-up when the computer is turned on
Highlight one of the following settings below When Mac OS X starts up:

Start this application

Start this application in the background

Do not start this application

Turn automatic start-up when connecting USB modem to computer on or off
Click Start this application when a mobile device is plugged in or switched on to turn the function on or off.

Exit
Click OK to close the window.
