Yes, you can use the same wallpaper on different iPhone models, but the image may be cropped or adjusted depending on the screen size and aspect ratio. To ensure compatibility across multiple devices, use a high-resolution wallpaper with a portrait orientation. iOS automatically scales and positions wallpapers to fit the screen, but important details near the edges may be cut off. For the best appearance, keep key elements centered and use a larger image that can adapt to various iPhone screen dimensions. know more about iphone wallpaper dimensions