Download the correct firmware file for the SR120-A from the official FiberHome support site or your ISP’s portal. Ensure the file matches your specific hardware revision. Log in to the router interface. Navigate to Firmware Upgrade.
FiberHome SR120-A Firmware: The Complete Guide to Updates and Optimization fiberhome sr120-a firmware
Go to Management or System Tools and select Firmware Upgrade. Click on Check for Updates. Download the correct firmware file for the SR120-A