You can change the language for the display text in your phone. This change will also affect the format used for date and time and the separators used. Go to Tools > Settings > Phone settings > General > Phone language. After choosing a new language, you must restart the phone.

You can download ringing tones from the web. If you download a sound, it will appear on the ringing tones list.

You can copy a nice picture from a compatible PC to your Nokia 3660 phone for use as a wallpaper. The size of the wallpapers is 176 x 132 pixels, so you may want to resize the picture with your PC if you want the image to cover the whole display.

Connect your Nokia 3660 phone to the PC and transfer the picture to your phone. To insert the new wallpaper, select Tools > Settings > Phone settings > Standby mode > Background image.