Hi MimiV,
You can restore factory settings in either of the following ways:
Method 1: When the Huawei Mobile Wi-Fi is powered on, open the rear cover of the product, and press and hold the Reset button until all indicators blink. Then release the button to restore factory settings and restart automatically.
Method 2: Log in to the management page, choose Advanced Settings > System > Factory Defaults, and touch Restore.
In addition, you can ask more questions at the Huawei Consumer Forum. https://consumer.huawei.com/en/community/list/?forumId=10014