Huawei Echolife Hg8245w5 Firmware Download - Google |link| Direct

If you find a file, check the version number. Never downgrade from R022 to R019. Never flash a file labeled "V500R019C00SPC..." unless you are 100% sure it matches your hardware revision (check the sticker on the back of the ONT).

If you are a tinkerer looking to unlock the device (get the root/admin password), that is a different guide entirely—and that also doesn’t require a firmware download. Huawei Echolife Hg8245w5 Firmware Download - Google