Samsung galaxy S6 User Manual page 293

2. Tap Lock screen and security
The lock screen and security menu opens.
3. Tap On/Off next to Unknown sources to enable installation of non-Google Play applications.
Warning: Enabling installation of third-party applications can cause your device and personal data
to be more vulnerable to attacks by unknown sources.
4. Tap Protect encrypted data and follow the prompts to encrypt all data on your device.
5. Tap Other security settings to configure the following options:
Make passwords visible: Display password characters briefly as you type them.
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Security policy updates: Automatically or manually check for security policy updates.
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Settings
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