LG LGD851TN - Manual (Page 100)

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Lock screen - Checkmark to adjust the position of the the PIN entry.
Help - Displays help information for each available option.
Shortcut key
Get quick access to apps by pressing and holding the Volume Keys when the
screen is off or locked.
Volume Up Key: To access QuickMemo+.
Volume Down Key: To access the Camera.
Security
Use the Security menu to configure how to help secure your phone and its data.
Content lock - Select lock types to lock files in Gallery and QuickMemo+.
Encrypt phone - Allows you to encrypt data on the phone for security. You will
be required to enter a PIN or password to decrypt your phone each time you
power it on.
Encrypt SD card storage - Encrypt SD card storage and keep data unavailable
for other devices.
Set up SIM card lock - Allows you to set if you want to require a PIN to use or,
if set, allows you to change the PIN.
Password typing visible - Checkmark to briefly show each character of
passwords as you enter them so that you can see what you enter.
Phone administrators - Add or remove phone administrators.
Unknown sources - Allow installation of non-Play Store applications.
Verify apps - Disallow or warn before installation of apps that may cause harm.
Notification access - Your device will be able to read all notifications posted by
the system or and installed app, which may include personal information such
as contact names and the text of messages sent to you.
Storage type - Displays the storage type for credentials.
Trusted credentials - Checkmark to allow applications to access your phone’s
encrypted store of secure certificates and related passwords and other
credentials. You use credential storage to establish some types of VPN and
Wi-Fi connections. If you have not set a password for the secure credential
storage, this setting is dimmed.