How To Use Unknown Sources On Samsung Galaxy S4
Learn how to install apps from the unknown sources on your Samsung Galaxy S4. This feature allows you to download and install non-Market applications.
- From the Home screen, tap Apps > Settings > More tab > Security.
- Tap Unknown sources.
- A check mark is displayed to indicate it is active.
Note: Enabling this option causes your phone and personal data to be more vulnerable to attack by applications from unknown sources.