: Use a stable USB port, preferably directly connected to a computer motherboard rather than an unpowered USB hub.
: UPDATE 21.335.01.00.233 (WEBUI 21.100.50.03.233).
: Plug the Huawei E8372 into a USB power source and connect your computer to its WiFi network. huawei e8372h-155 firmware update
If the dongle no longer shows a Wi-Fi signal or is detected as "Unknown USB device":
This is the most dangerous step.
: Ensure your current settings—such as Wi-Fi name, password, and broadband account details—are saved so you don't have to reconfigure the device after the reboot. HUAWEI Global
Over‑the‑air (OTA) updates
Before attempting an update, verify your current software version: Connect your device to a PC or join its Wi-Fi network. Open a browser and enter 192.168.8.1 . Log in to the web-based management page.
Comprehensive Guide to Huawei E8372h-155 Firmware Update: Enhance Performance and Security : Use a stable USB port, preferably directly