Nokia Lumia 830 Windows Phone How to Set Screen Lock Password
У вашего броузера проблема в совместимости с HTML5
Access the notification screen by swiping down. Find ‘All settings’ and touch it. Select “Lock Screen” by touching it. Now come downward and touch the Password slider. Enter the password. Now touch the Confirm password fill. Enter the same password again to confirm the password. Find the Done button. The password has been set.