Samsung Galaxy Core Prime User Manual page 338

4. When prompted, draw the screen unlock pattern again, and then tap Confirm.
 The screen unlock pattern is saved.
5. Enter a backup PIN, tap Continue, re-enter the PIN, and tap OK to save your screen unlock
pattern.
 The screen lock is set.

If you fail to draw the correct unlock pattern on the screen after five attempts, you will be
prompted to wait for 30 seconds before you can try again.
Settings 329