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a PIN code. Touch Change SIM PIN to change the PIN code.
SMS message limit
Touch to set a SMS message limit alert in order to prevent
applications from sending SMS two frequently.
Make passwords visible
Touch the switch to show passwords as you type.
Device administrators
Touch to view activate or deactivate device administrators.
Unknown sources
Mark the checkbox to permit installation of applications that
you obtain from web sites, emails, or other locations other
than Google Play Store.
To protect your device and personal data, download applications
only from trusted sources, such as Google Play Store.
Trusted credentials
Touch to display trusted CA certificates.
Install from Storage
Touch to install encrypted certificates from Recent,
Downloads, Internal storage or SD card.
Clear credentials
Touch to remove all credentials.
Trust agents
Touch to activate or deactivate trust agents.
Screen pinning
When this function is enabled, you can always keep a window
in view by touching the Recent apps key and then the pin icon.
In this case, the user cannot go to any other window or open
any other app.
To stop pinning a window in view, long press both the Back and
Recent apps key together, then entering your screen unlock
password or drawing your unlock pattern.