Once you have the correct firmware file, follow these steps:

Log in using the admin credentials (default is usually username: admin / password: admin ).

Click on the tool. The software will begin broadcasting the firmware data over your network.

Huawei E5172 Updater Tool Guide | PDF | Wi Fi | Computing - Scribd

What is the on your router's sticker (e.g., E5172s-22, E5172s-927)? Which network provider branded your router originally?

If the router is functioning, you can check for updates via the local dashboard: Routers Software & Firmware Download Huawei Routers Software & Firmware Download Huawei. Huawei E5172 Updater Tool Guide | PDF | Wi Fi - Scribd