Update - Huawei E8372h-155 Firmware

The Huawei E8372h-155 is a popular USB Wi‑Fi dongle (also sold as a "Wi‑Fi stick" or "mobile Wi‑fi modem") that provides 4G/LTE connectivity and creates a local Wi‑Fi hotspot for nearby devices. Updating the device firmware can add features, improve stability, fix bugs, and address security issues. This guide explains firmware update considerations, preparation steps, methods to update, troubleshooting tips, and best practices to reduce risk when updating the E8372h-155.

Common reasons:

Once you have downloaded the firmware file, follow these steps: huawei e8372h-155 firmware update

Wait: Click "Update" and do not touch the dongle. The progress bar will move. The device may restart several times. This usually takes 3–5 minutes.

Completion: Once the window says "Success" and the dongle’s LED light stabilizes (usually solid blue or cyan), the update is complete.

As of 2025, the most stable firmware for the E8372h-155 is 21.333.01.00.155 combined with WebUI 21.100.31.00.155. This version fixes the "SMS memory full" bug and improves IPv6 handshake speeds. The Huawei E8372h-155 is a popular USB Wi‑Fi