Sharp AQUOS Crystal - Manual (Page 44)

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Changing USIM PIN
Lock USIM Card first. See " Enabling USIM Card Lock " for
details.
In app sheet, (Settings) Other settings Lock
& Security
USIM card lock settings Change USIM PIN Enter
current PIN OK Enter new PIN OK Re-
enter new PIN OK
PIN is changed.
Screen Lock
After a period of inactivity, Display goes completely dark to
save battery power (Screen lock active). Screen lock prevents
accidental Touchscreen operation.
If Screen Lock Activates while Playing
Music
Music continues to play. For operation, Press to
open Welcome sheet (lock screen) and use operation panel
(operations may vary depending on application).
Activating Screen Lock Manually
When Display is active,
Display goes completely dark and Screen lock activates.