Netgear WNDR4720 firmware updates help you to resolve several issues with the router. And upgrading the Netgear WNDR4720 adds features to the router. Let’s check out the steps to perform Netgear WNDR4720 firmware update:  Start by opening a web browser on your computer and then visit Netgear's official website.  Now, download the latest firmware version of the Netgear router.  Connect computer and router by using an Ethernet cable.  Type www.routerlogin.com and click on enter.  Tap on advanced under the administration tab.  Tap on the firmware update option.  Select upload and then choose the downloaded file.