Mac OS X 10.3: Modem Country Setting incorrect after using Setup Assistant

It may happen in this specific sequence of events:

• When offered Get Internet Ready options in Setup Assistant, you choose "I'm not ready to connect to the Internet."
  
• Then, for Register With Apple, you choose Register Later.

This happens when using Mac OS X 10.3 to 10.3.9 and a Macintosh with a Jump modem. You can see what kind of modem your computer has in Apple System Profiler.

To get back to the right Country Setting, follow these steps:

1. From the Apple menu, choose System Preferences.
2. From the View menu, choose Date & Time.
3. Click Time Zone.
4. Change the Time Zone to one other than where you are actually located.
5. Select any city from the Closest City pop-up menu.
6. From the View menu, choose Network.
7. Choose Internal Modem from the Show pop-up menu.
8. Click Modem.
9. Verify the Country Setting is correct for that time zone and city you selected.
10. Repeat steps 3 through 9, but this time enter the correct time zone and city.