Follow these sequential steps carefully to ensure a successful installation without file corruption or driver conflicts. Step 1: Prepare Your Computer
Furthermore, using a cracked license violates the developer’s terms. If you are a professional, purchase an official license (usually $50–$100) to support updates and avoid hidden backdoors.
| Problem | Likely Cause | Solution | |---------|--------------|----------| | | Antivirus quarantined the .exe file | Add the entire BMB folder to your antivirus exclusions list. Re-extract the files if necessary. | | Phone not detected (Error: No device) | USB drivers are missing | Install Qualcomm or MediaTek USB drivers. Uninstall any conflicting phone managers (e.g., Samsung Kies, Mi PC Suite). | | "Failed to connect to COM port" | Driver conflict or another tool using the same port | Close all other phone software. Restart your PC. Use a different USB port (preferably USB 2.0). | | "Auth Bypass Failed" (MediaTek) | The phone requires an authentication bypass for newer chipsets | Use the "Bypass Auth" feature in the BMB tool before performing the main operation. | | Tool freezes or crashes | Running without Administrator rights | Close the tool. Right-click the .exe and select "Run as Administrator." | | Malwarebytes deletes the tool after installation | The driver is flagged as a Trojan | Open Malwarebytes, go to Detection History , find the quarantined file, and restore it. Then, add the BMB folder to Malwarebytes exclusions. | | "Samsung KG State: Prenormal" prevents unlock | KNOX Guard is active | Use the "Samsung KG Locked Enable" option. Put the phone in Download mode and click "Erase KG" before unlocking the bootloader. |
The BMB Unlock Tool is widely used in the mobile repair community for its multi-brand compatibility. Key features often include:
Right-click the executable and select "Run as Administrator" to ensure it has the required permissions to modify device partitions. Expert Review & Verdict
Before beginning the installation, ensure your computer meets the following minimum requirements to prevent software crashes or connection failures. Requirement Minimum Specification Windows 7 / 8 / 10 / 11 (64-bit recommended) Processor Intel Core i3 or equivalent AMD processor RAM 4 GB minimum (8 GB recommended) Storage 1 GB of free storage space Dependencies .NET Framework 4.5 or higher, USB LibWin32 Step 1: Pre-Installation Prerequisites