Sony Xperia User Manual page 472

Security
Security
Security
Set security functions such as Screen lock, SIM card lock, etc. Settings can be made for the
following items.
Shown items depend on the setting for "Screen lock."
Screen lock
Make pattern visible
Automatically lock
Power button instantly locks
Owner info
Smart Lock
Encrypt phone
Encrypt SD Card
Set up SIM card lock
Make passwords visible
Device administrators
Unknown sources
Storage type
Trusted credentials
Install from device memory/SD card
Clear credentials
Trust agents
Screen pinning
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Item Description
Set Screen lock.
Enable pattern to be visible as pattern is traced to
unlock screen.
Set time until screen locks after Display light goes
out after period of inactivity.
Enable Screen lock soon after Pressing
Set owner information that appears in lock
screen.
When unlock method of Screen lock is set to
"Pattern"/"PIN"/"Password," enable to unlock
automatically.
Encrypt handset data.
Encrypt file that will be stored in SD Card.
Make settings for SIM Card lock.
when entering PIN/Password.
Enable device administrator to be shown.
Enable installation of applications from unknown
sources.
Show type of credential storage.
Show trusted credentials.
Install certificates from handset memory or SD
Card.
Delete all certificates.
Show trusted agents.
Set to pin screen. When ON is set, pinned screen
.