To set your background / wallpapers, open the Settings App and choose 'Wallpaper' or use the Photos App. Choose the image you want to use in the Camera Roll.
step 1. Enter your camera Photos section. Search albums or camera for picture you choose.
step 2. Choose the picture to display it full screen.
step 3. Tap the icon in the lower left corner of the screen. Don't see it - single tap the picture for displaying the menus.
step 4. You can select from here if you wish to send the image via email, save it as your wallpaper, or assign to a contact.
step 5. Wish to assign to a contact - press that button. The contact list will automatically open. Select the contact for linking to the picture.
step 6. Press "Done" to complete the process.