Step 1: Open the connection that we provide for you, tick the mark in the following figure, and then click download.

Step 2: On the page that is displayed, enter your contact information and related information, and click Upload. The system will send the result to your email box. If you do not have the permission, contact your device provider.

Your device model belongs to the carrier's device. I suggest you contact the carrier first,
Huawei ONT is used with an OLT and NMS of a required version. If the versions are not the required ones, the ONT may not work.
Thanks!