If you need to unbrick → Use TFTP + serial console. If in doubt → Don’t flash.
Would you like a specific guide for a particular Huawei ONT model (e.g., HG8546M, EG8145V5, HN8255Ws)? Huawei Ont Firmware Flash Tool
This guide covers what it is, prerequisites, step-by-step flashing instructions, and troubleshooting. 1. What is the Huawei ONT Firmware Flash Tool? The "Huawei ONT Firmware Flash Tool" is not a single official application but a combination of methods and utilities used to upgrade, downgrade, or recover firmware on Huawei Optical Network Terminals (ONT)—e.g., HG8245, HG8546M, EG8145V5, etc. If you need to unbrick → Use TFTP + serial console