Huawei classifies carrier endpoints and ONTs under its enterprise division. Because of this, firmware files are not hosted on open, public download pages. You can safely acquire the firmware file through two official channels: 1. The Official Huawei Enterprise Portal
Log into your ISP’s customer portal. Many providers (e.g., Telmex in Mexico, Claro in Brazil) offer firmware downloads under “Support → Downloads → ONT Firmware.”
Are you trying to fix a (like slow Wi-Fi or drops)?