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The lock code protects the contents of your device from unauthorised use. If use of lock code is turned on, it needs to be keyed in when you turn on your device. Follow these instructions to turn use of lock code on or off.
You need to turn on use of lock code before you can change it. Click here for information on how to turn use of lock code on or off.
Find "Screen lock"
Change lock code
Press Slide, Face Unlock, Pattern, PIN or Password.
Follow the instructions on the display to change the lock code.