Published at Sunday, September 27th 2020, 19:28:30 PM by Alba Dunlap. Iphone 11. Resolution Is Too weak! Sometimes the resolution of the wallpaper is too weak meaning its resolution is at 72 dpi. The iPhone picture standard is 300 dpi. Unless you do not mind having wallpapers that do not even look as sharp as the iPhone sleek design go for the ones that do look sharp. Or just go on the websites that have sharp high quality resolutions wallpapers.