If you have the .bin or .hwt firmware file and the Upgrade Tool:
To flash firmware on a Huawei Optical Network Terminal (ONT), you typically use specialized software like the Huawei ONT Upgrade Tool huawei ont firmware flash tool
The Huawei ONT Firmware Flash Tool is a software utility designed to upgrade, downgrade, or restore the firmware of Huawei ONT devices. The tool allows users to flash new firmware versions, fixing bugs, improving performance, and adding new features to their ONT devices. This tool is particularly useful for internet service providers (ISPs), network administrators, and advanced users who want to customize and optimize their ONT devices. If you have the