Published at Friday, October 02nd 2020, 09:52:19 AM by Esther Kim. Iphone 11. Long Version: What sort of image can you use as a wallpaper? Wallpapers can be obtained in a variety of ways. Any photograph you have stored in the photos app on your device can be used as a wallpaper. You can also download images from a number of places on internet. These have been specially created for use as iPhone wallpapers and are the correct size and aspect ratio and the images are usually composed to fit well within the iPhone format. You can download my specially designed wallpapers here if you wish.