Find "change password"
Slide your finger left on the display.
Press Settings.
Press Settings.
Press lock screen.
Press change password.
Change phone lock code
Press the field below "Current password" and key in the phone lock code.
Press the field below "New password" and key in a new phone lock code.
Press below the field below "Confirm password" and key in the new phone lock code.
Press done to confirm.
Return to the home screen
Press the Home key to return to the home screen.