Once you have obtained the correct firmware file, follow these steps to perform the update:
Note: Huawei does not host these legacy firmware files on a public consumer portal. The links below are standard stock firmware versions found in open technical archives. huawei echolife hg8546m firmware download link
If the official portal is locked for you, many tech communities provide verified mirrors and guides: Once you have obtained the correct firmware file,
Ensure you do not disconnect the power during an update, as this can permanently damage the router . Navigate to the "Software Download" tab
Navigate to the "Software Download" tab. If you have the authority, all released versions will be listed there for you to download.
If you want, I can draft a shorter forum post or a version tailored for a specific ISP/region — tell me which one.