Huawei manufactures hardware specifically tailored to ISPs across the globe. Flashing an ISP-specific firmware from a different region can render your fiber port completely useless.
This is the recommended path for home users. Your ISP is responsible for ensuring the firmware version matches their network infrastructure. You should contact your service provider directly to request the correct software or a remote update. huawei hg8321r firmware download
Look at the bottom sticker. If it says "HG8321R V2" or "V300R017," that is your target. " that is your target.