Most HG8546M units are sold directly to ISPs. These ISPs often use custom firmware
Call your ISP’s technical support. Ask: “I have an HG8546M ONT. Is there a firmware update available for my line stability?” They may push it remotely via TR-069. huawei echolife hg8546m firmware download link
: A long-running discussion thread on 4PDA includes various firmware mentions for this model. Most HG8546M units are sold directly to ISPs
If you absolutely must search for a file, append your hardware version and ISP to the keyword. Example: "HG8546M V300R016 Vodafone firmware download" – this yields better, more specific results than the generic keyword. huawei echolife hg8546m firmware download link