Go to > Security (or Apps & Notifications > Special app access ). Select Install unknown apps .
Once the download is complete, open your and go to the Downloads folder. Tap the .apk file to begin the installation. Follow the on-screen prompts and tap Install . 4. Apply the Parallax Wallpaper 4D Parallax Wallpaper 3D HD 4K - Apps on Google Play Go to > Security (or Apps & Notifications
: A popular alternative store for various versions of parallax background applications. Go to > Security (or Apps & Notifications
: Provides scanned APK files with security verification from validated developers. 2. Enable Unknown Sources Go to > Security (or Apps & Notifications
: Often hosts older and specific versions of 3D Wallpaper Parallax apps.