The Huawei E173u-1 is a legacy 3G USB dongle widely used across global networks like MegaFon and Safaricom. Unlocking its firmware allows you to use SIM cards from any carrier, but because of the device's age and hardware variations, the process has mixed reviews regarding stability and ease of use. Unlocking Effectiveness
Download Firmware: Locate a compatible update file, such as E173Update_11.126.85.00.209_B427.exe. Huawei E173u-1 Unlock Firmware
| Error Code / Symptom | Cause | Solution | | :--- | :--- | :--- | | "Update fail: Bootloader mismatch" | Firmware version is too old/new | Downgrade to Huawei stock v11.810 first. | | Device disappears mid-flash | Power surge on USB port | Use a powered USB hub. Reboot PC, start over. | | "No SIM" after flash | IMEI corruption | Restore NV-RAM backup. Flash only the "Amss" partition. | | Dashboard says "Locked to 3G only" | Firmware mismatched region | Flash a generic E173u-1 firmware (not carrier specific). | | Windows code 10 error (Device cannot start) | Driver signature enforcement | Reboot Windows → Disable driver signature enforcement. | The Huawei E173u-1 is a legacy 3G USB
IMEI Number: A 15-digit code unique to your modem, usually found under the battery cover or on the device casing. Uninstall all Huawei drivers via Device Manager >
Verification: Users often use DC-Unlocker to confirm the modem's locked status before and after applying firmware updates.
Device Manager > View hidden devices. Reinstall.