1. Insert SIM
Insert your SIM into your data card.
2. Connect your data card and your computer
Connect your data card to your computer's USB port.
3. Start the data card application
Do the following in Snow Leopard:
Double-click Vodafone Mobile Broadband.
4. Select operator
Click the Select the mobile network operator with whom you have an account, and then click 'Continue' drop down list.
Highlight your operator and click Continue.
5. Accept license agreement
6. End the installation
If you're on a pay monthly price plan:
Highlight Bill pay.
If you're on a prepaid price plan:
Highlight Pay as you go.
Key in your username and password for the computer and click OK.
Wait while your data card is installed.
7. Enter PIN
Key in your PIN and click OK.