LG G3 User Manual page 108

Settings
108
Content lock: Select lock types to lock files in the Gallery app. Choose
Password or Pattern.
Encrypt phone: Allows you to encrypt data on the phone for security.
Each time you turn on your phone, a PIN or password will be required to
decrypt your data.
Encrypt SD card storage: Allows you to encrypt of decrypt external SD
card data. Encrypted data is not accessible to other devices.
Set up SIM card lock: Allows you to set a PIN to be required to use the
phone. You can also change the PIN after setting it.
Password typing visible: Checkmark to briefly show each character of
the password as you type so that you can see what you enter.
Phone administrators: Displays the list of administrators, allowing you
to deactivate device administrators.
Unknown sources: Checkmark to allow installation of non-Play Store
apps.
Verify apps: Checkmark to disallow or warn before installation of apps
that may cause harm to your phone.
Storage type: Displays the current storage type for credentials (e.g.,
Hardware-backed).
Trusted credentials: Allows apps to access your phone's encrypted
store of secure certificates, related passwords, and other credentials.
The screen has a System tab and a User tab. Credential storage is used
to establish some kinds of VPN and Wi-Fi connections. This setting is
dimmed if you haven't set a password to secure your credential storage.
Install from storage: Allows you to install a secure certificate from
storage.
Clear credentials: Deletes all secure certificates and related credentials
and erases the secure storage's own password. Your're prompted to
confirm you want to clear this data.
Trust agents: View or deactivate Trust agents, which allows you to
select which apps to use without having to unlock the screen.