You can manually update Netgear jnr3210 firmware by connecting your PC to your router with an Ethernet cable. Open a web browser and type the official link to log-in. The router log-in window displays before you, and you have to enter the router admin user name and password. The default user name is admin, and the password is that you use while sign-into the router. Select the Advanced option and choose Administrator in it. Now, you can choose the Firmware update to update it. Read more wndr4700 firmware