Nokia 7900 Crystal Prism support
Personalize
Set a wallpaper
Select Menu > Settings > Display and from the following options: Wallpaper - to set your device to display an image or a slide as wallpaper in the standby mode. Select Wallpapers > Image or Slide set, scroll to the relevant folder and select the image or slide set you want.
Themes
A theme contains various elements for personalizing your phone such as wallpaper, screen saver, etc. Want to personalize your phone? Select Menu > Settings > Themes > Select theme > Themes and choose the theme you wish to use.
Assign ringing tones
To easily identify who is calling you by the ringing tone, you can assign a specific ringing tone to a selected caller group. Firstly, go to Menu > Contacts > Groups to create a new group and assign a group tone. After that, arrange the names and phone numbers into caller groups.