Hg8245w5 Firmware Upgrade -

This usually means the file version is incompatible with your hardware region. Check if your ONT is a "Global" version or a "Carrier-Specific" version.

If the HG8245W5 is bricked (continual reboots, no web access), use this last resort. Hg8245w5 Firmware Upgrade

You can visit the Huawei Support Portal. Note that you usually need a registered "Enterprise" account to download firmware binaries (.bin or .tar files). This usually means the file version is incompatible