To begin the firmware upgrade process, open a web browser on a connected device and go to the Linksys RE6400 setup page. To find the most recent firmware version, go to the Firmware Upgrade section. Download the updated firmware from the Linksys support website and save it to your computer if it is available. After that, on the firmware update screen, choose the Browse or Choose File option, then navigate to the firmware file you just downloaded. When you select a file and click "Upgrade," the firmware installation process will start. It's critical to avoid cutting off the power or disconnecting the device while performing the upgrade. The range extender will resume after the firmware upgrade is finished, at which point you can use the most recent improvements and problem fixes. Regular firmware updates for your Linksys RE6400 help to ensure top wireless network performance, new features, and increased security.