Galaxy phone or tablet won't install apps from unknown sources

By default, your Galaxy phone or tablet is set to prohibit apps from being installed from sources other than the Play Store and Galaxy Store. However, you can change this setting if desired. Please be aware that this can increase security risks.

Galaxy phone or tablet won't install apps from unknown sources

Warning
Your phone and personal data are more vulnerable to attacks from unknown apps. By installing apps from other sources, you agree that you're responsible for any damage to your device or loss of data that may result from their use.
2

Allow permission.

Tap the switch next to the source that you want to allow app installations from, such as Chrome.
 

Deny all highlighted

Note
You can tap Deny all if desired.
3

Try to install the app.

Your phone or tablet may prompt you with an option to allow Google to inspect installed apps for security. If enabled, this option may still prevent apps from installing. 

 

If this occurs, you can try going back to the app or file you'd like to install, and then try installing it again.

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