Pressing and holding the red reset button located on the back of the Fios Quantum Gateway will restore the router to the factory default settings shown on the label located on the side of your router. Use the pointed end of a paperclip to press and hold the reset button for 15 seconds.
Important Note: If you have customized your network name and/or password, resetting your Fios Quantum Gateway to the factory defaults not only changes your router username and password back to the factory default values, but it also deletes all of your home network settings. This includes the ESSID and network encryption key that you created. After you reset your factory defaults, your home network won't be accessible until you reconfigure your gateway and update all your network devices to use the same customized ESSID and network encryption key (WPA2).
To reconfigure your Fios Quantum Gateway visit My Verizon account or the My Fios app.