The update comes with a build version of 10.0.40.HD61CB and weighs about 46MB in Size. You will receive a notification when the update arrives on your phone. You can also check it manually by heading to Settings -> System -> System updates -> Check for updates. Security patch updates increase the security mechanism of the device, thus making it more secure to use. Therefore, it is always advisable to keep your device updated with the latest security updates.
