Sometimes when installing themes to your Nokia 6120, you'll see the dramatic message "Expired certificate!" (see Figure 1). And you won't be able to install the theme.

This is because security measures within the Nokia Series 60 operating system only let you install themes which are less than six months old.

But all is not lost, and that great theme can be yours after all. You just have to move the date on your N95 back a year, install the theme, then change the date back to normal.

To change the date on your Nokia 6120, follow these instructions:

• Go to the main menu and click on Settings
• In the Settings menu click on Phone Settings
• In the Phone settings menu click on General
• In the General menu click on Date and Time
• Click on the Date field
• Use the Right navigation key to highlight the year. To change the year back one year, press the Down navigation key once
• Click on the OK button

Now install your new theme. If you still see the Expired certificate error, change the year back another year and try installing again.

When it's installed, follow the instructions again, setting the year back to the present by highlighting the year and pressing the Up navigation key once.