To do that you have first to launch the Settings app and head over to the Lock Screen option under Device section. (phoneradar.com)
Now head over to the about device section, there open the software updates options and then tap on the first option, to check for the system updates. (phoneradar.com)
To do all this, you have to launch the Settings app and then head over to the notification manager option under Device section. (phoneradar.com)