Always run the .exe file through VirusTotal before opening. The legitimate tool should have 0/60 detections.
Do not perform a firmware upgrade over WiFi. Use an Ethernet cable from your PC to LAN port 1 on the E5172. A dropout over WiFi = a bricked router. download huawei e5172 firmware upgrade tool
You may see screenshots of a tool called — a small .exe used for old 3G dongles (E220, E156). It does not work with the E5172. Always run the