If your modem features a very new firmware version, forcing an unlock with this legacy tool can corrupt the security zone of the device.

This software is an unofficial, reverse-engineered utility. It is not approved, signed, or supported by Huawei or any cellular carrier.

Is the device currently showing an or a "SIM Lock" error screen? Share public link

By removing the "SIM Lock," users can switch to local carriers while traveling or choose more affordable data plans, significantly increasing the device's utility.

Locate the Huawei Modem Unlocker v5.7.7/v5.7.8 by Bojs from a reliable source.

Follow these instructions carefully. Any interruptions during the writing phase can corrupt the device firmware. Step 1: Download and Extract the Utility

The v577 version excels at unlocking older to mid-generation Huawei USB hardware platforms. This tool commonly services popular device families such as:

: This specific version was tailored for modems using newer firmware algorithms (often referred to as "New Algo" or V2 codes) that the older v1 calculators couldn't handle. A DIY Culture : The tool became a staple on forums like Google Groups

Run the executable file as an Administrator.

Potential benefits

To unlock your device using the software, follow these technical steps:

This article is for informational purposes only. The procedures described carry inherent risks and may void your warranty. The author and publisher assume no responsibility for any damage to your device or loss of data. Always comply with local laws and your service provider's terms of use.

Launch the tool as an Administrator. Click the or Detect button within the software interface. The application will scan your PC's Device Manager to identify the correct diagnostic and COM ports associated with your Huawei modem hardware. Step 3: Read Device Information

Disable temporary antivirus/Windows Defender guards. (Legacy GSM flashing tools often trigger false positives due to their low-level USB commands). Step 2: Connection & Setup Insert an into your Huawei modem.