iPhone 640 X 960
  1. Touch the image and hold
  2. Select "Save Image"
  3. Go to Photos
  4. Select the downloaded image
  5. Tap the arrow icon in the bottom left corner of the screen.
  6. Select "Use as Wallpaper"
  7. Size the wallpaper image by manipulating it back and forth within the touch screen until you have your desired shape and size.
  8. Touch "Set as Wallpaper"