If your wallpaper carries the image of your selfie, you are possibly a narcissist or have extreme self-confidence. But the former has more weight.
An individual with a default wallpaper is likely to be easy-going. People choose this because it is clear and enables have a clear view of most things in the phone. Their character is easy and acquire many friends.
Having your cat or puppy as the wallpaper looks cute. That is your furry companion to inspire you everywhere even in their absentia. Some people may not own one but can download or steal a cool animal pic and set as wallpaper. It shows you love living in the fantasy world, which facilitates your connection to more furry friends. It also indicates a high creativity level seen in your imagination.