On iPhone (iOS):

1. Tap and hold the image.

2. Choose “Add to Photos” or “Save to Photos.”

3. Open the Photos app and find the wallpaper.

4. Tap the Share button → Use as Wallpaper.

5. Adjust and set it as your Lock Screen, Home Screen, or Both.

On Android:

1. Tap and hold the image.

2. Choose “Download image” or “Save image.”

3. Open your Gallery/Photos app and find the wallpaper.

4. Tap the More/Options button → Set as Wallpaper.

5. Choose Home Screen, Lock Screen, or Both.