Samsung galaxy grand prime User Manual page 328

The screen lock is set.
If you fail to draw the correct unlock pattern on the screen after five attempts, you will be
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prompted to wait for 30 seconds before you can try again.
Note: Clear the Make pattern visible check box if you do not want the unlock pattern to display on
the screen when you unlock it.
Note: To change your unlock screen pattern, from home, tap Apps
Screen and Security
Use a Screen Unlock PIN
1. From the Screen lock type menu, tap PIN.
Settings
> Screen lock type.
> Settings > Lock
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