Huawei Modem Unlocker v5.8.1 by Bojs is a specialized third-party utility designed to remove network restrictions from Huawei modems and dongles. This allows you to use SIM cards from any network provider globally. 1. Download and Installation Locate the Tool
: The tool is available on various community platforms and file-sharing sites like Extract Files
: Download the compressed file and extract its contents to a folder on your Windows PC using software like WinRAR or 7-Zip. Install Drivers
: Before launching, ensure your Huawei modem drivers are properly installed so the computer recognizes the device. 2. Connecting Your Device Preparation
: Close any official modem dashboard or internet connection software currently running. Connection
: Plug your Huawei modem into a USB port on your PC using a standard cable. : Launch the "Huawei Modem Unlocker" application. Click the
button to allow the tool to scan for your device. You should see your modem’s model and IMEI number appear once detected. 3. Unlocking Procedure There are two primary ways to unlock using this tool: Automatic Unlocking Select your modem from the list. Auto-Unlock Modem
Wait for the progress bar to complete. A success message will appear when finished. Manual Calculation Locate the
field in the tool and enter your modem's 15-digit IMEI number. Calculate Code to generate a unique Unlock Code Flash Code
Insert a SIM card from a different network into your modem and reconnect it to the PC.
When the modem software prompts for a code, enter the generated Unlock Code 4. Key Features Universal Compatibility
: Supports a wide range of Huawei models including E156, E155, E160, and E1550. Multiple Functions : Beyond unlocking, the tool can reset/reboot the modem, enable voice features , or perform temporary unlocks. Network Flexibility download huawei modem unlocker v581b by bojs latest updated
: Allows you to configure new internet settings (APN, username, password) for different service providers. Google Groups ⚠️ Safety and Success Tips Check Attempts
: Most modems only allow 10 unlock attempts. Ensure the code generated is correct before entering it to avoid permanent locking. Stay Connected
: Do not disconnect the modem or power off your computer while the unlocking process is in progress.
: Some newer "v4" or "v5" firmware versions may require more advanced tools if this version does not support them. specific network settings (APN) for a particular carrier to use after unlocking? Huawei Modem Unlocker V.5.7.8 - Google Groups
This paper provides a comprehensive overview of Huawei Modem Unlocker v5.8.1 by BOJS, a popular third-party utility used to remove network restrictions from Huawei USB modems and dongles. 1. Introduction
Huawei modems are often sold "locked" to a specific network provider (e.g., MTN, Airtel, Three). The Huawei Modem Unlocker v5.8.1 by BOJS is a free software tool designed to bypass these locks, allowing users to use SIM cards from any carrier. This process is essential for users seeking better coverage or more affordable data plans while traveling. 2. Core Features
The software is recognized for its simplicity and a suite of tools that go beyond basic unlocking:
Temporary & Permanent Unlocking: Provides options to test a SIM card temporarily or commit to a permanent network unlock.
Voice Feature Management: Can enable or disable voice calling capabilities on supported hardware.
Modem Control: Features to reset, reboot, or factory reset the connected device.
Code Generation: Calculates both Unlock Codes and Flash Codes using the device's unique IMEI number. 3. Operational Procedure Unlocking a Huawei modem generally follows these steps: Huawei Modem Unlocker v5
Preparation: Disconnect from the internet and close all active modem software.
Identification: Launch the tool and enter the modem's 15-digit IMEI number (usually found on the device's sticker).
Calculation: Click "Calculate" to generate the necessary codes. Application: Insert a SIM card from a different network into the modem. Connect the modem to your PC.
When the modem software asks for an Unlock Code (SIMLOCK Code), enter the code generated by the tool.
Configuration: After unlocking, you must manually set up the new network's APN settings in the modem's dashboard (e.g., at http://192.168.8.1) to access the internet. 4. Safety and Security Considerations
Source Integrity: As this is third-party software, users should only download it from reputable community forums or verified links to avoid malware.
Risk of Bricking: Incorrectly flashing firmware or entering the wrong code too many times (usually 10 attempts) can permanently lock or "brick" the device.
Official Alternatives: For a safer approach, users can often request an official unlock code from their original network provider, sometimes for a small fee or after a contract period. 5. Compatibility
While v5.8.1 supports a wide range of older E-series models (like E156, E1550, E173), newer 4G/5G modems may require different methods or official codes as their security protocols are more advanced. Next StepsIf you'd like to proceed, I can help you: Find the default IP address for your specific modem model. Locate APN settings for a specific network provider. Troubleshoot if the modem is not detected by your computer. Let me know which modem model you are using! Huawei Modem Unlocker V.5.7.8 - Google Groups
Huawei Modem Unlocker is a small, portable Windows application designed to calculate unlock codes and remove network restrictions from Huawei USB modems and MiFi routers.
Version 5.8.1b is the latest updated release from Bojs. It features an improved interface and updated algorithms that support a wider range of devices compared to older versions like v5.7.7 or v5.8. Modems: E173, E1550, E1750, E303, E3131, E353, E367,
If the latest Bojs unlocker does not work for your specific modem, try these:
| Tool | Pricing | Best for | |------|---------|----------| | DC Unlocker Paid (~$15) | Older 3G/4G modems | | Huawei Code Calculator | Free | E173, E303 series only | | Universal Master Code | Free | Very old E1550, E156G | | HCU (Huawei Calculator Utility) | Paid | 2016-2020 modems |
But for 95% of Huawei 3G/4G modems, Bojs v581b latest remains the most reliable free option.
While this tool supports a vast majority of older Huawei modems, it is particularly effective for devices released between 2010 and 2017. Some of the popular supported series include:
(Note: For newer HiLink devices that use web UI unlocking, different methods may be required, though v5.8.1b has improved support for some HiLink models).
Unlocking a modem you legally own is permitted in most countries (including the USA under the 2014 Unlocking Act, and in the EU). However, using this tool on rented or carrier-owned modems (e.g., postpaid contract devices you do not own) may violate your service agreement. Always check your local laws.
This article is for educational purposes. The author does not host or distribute copyrighted files.
If you have an old Huawei modem collecting dust, and you’re tech-savvy enough to run the tool inside a Windows sandbox or a virtual machine, BOJS v581b is a fascinating piece of hacking history that still delivers results. But if you find a site claiming “2026 latest updated version”—run away. The real v581b hasn’t been updated since 2020. Anything newer is either a fake or a trap.
Better alternative: Use the free trial of DC-Unlocker to read your modem’s bootcode, then generate the unlock code manually. It’s safer, and you won’t risk turning your modem into a brick.
Have you used BOJS v581b? Did it unlock your modem or fry it? Share your story in the comments (on the original forum post).