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How to Enable "Unknown Sources" So You Can Download Third-Party Apps to Your Galaxy S5

Security settings menu on a Samsung smartphone displaying options for device administration and app installation sources.

When you try to install third-party applications (meaning apps not found in the Google Play Store) you'll be met with a warning that notifies you that your device currently blocks installations not obtained from the Play Store.

"Error message indicating installation of apps from unknown sources is blocked."

Enable Unknown Sources

In order to successfully download third-party apps, you'll need to enable Unknown sources:

  • Open up Settings on your S5 (through the app drawer or notification shade)
  • Slide down to the System section
  • Tap on Security
  • Check the box next to Unknown sources
Settings menu on a mobile device with security icon highlighted.
Settings menu displaying security options, including enabling installations from unknown sources.
Settings menu on a mobile device with security icon highlighted.
Settings menu displaying security options, including enabling installations from unknown sources.

Now you can download third-party applications without a problem on your Galaxy S5.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check our list of supported iPhone and iPad models, then follow our step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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