MacOS X

1. Click the Apple menu.

2. Click the System Preferences.

3. Click the Network icon in the System Preferences.
   
   
   

4.  Select Internal Modem or External Modem in the Show box.

5. Select the PPP tab.
   
   
   

6.  In the field labeled Telephone Number, erase the existing number and type in the new number 0198333030.

7. Click the Apply Now button.

8. All done!