Nokia Asha 503

Find "Phone lock"

Press Settings.

Find "Phone lock"

Press Phone lock.

Turn on use of phone lock code

Press the indicator next to "Security code" until the function is turned on.

Turn on use of phone lock code

Key in the required phone lock code and press the confirm icon.

Turn on use of phone lock code

Key in the phone lock code again and press the confirm icon.

Turn off use of phone lock code

Press the indicator next to "Security code" until the function is turned off.
Key in your phone lock code.

Return to the home screen

Press and hold the Return key to return to the home screen.