2. Driver Sign-Off/Digital Signature Errors on Windows 10/11
Identify the new virtual network adapter associated with the Huawei USB driver. Right-click the adapter and select . Double-click Internet Protocol Version 4 (TCP/IPv4) .
Older Huawei BBU drivers lack modern Microsoft digital signatures, causing Windows 10 and 11 to block execution. bbu3900 usb driver
Right-click on setup.exe or DriverInstaller.exe and select .
Huawei driver packages are typically bundled with the WebLMT software or distributed as standalone packages ( hw_usb_driver ). Ensure you obtain the official package from the Huawei Support portal or your regional project drive. The package generally includes separate folders for x86 (32-bit) and x64 (64-bit) architectures. Step 2: Connect to the BBU Double-click Internet Protocol Version 4 (TCP/IPv4)
Which version you are running (e.g., Windows 10 64-bit , Windows 11 ).
Power on the Huawei BBU3900 and wait for the RUN indicator light on the LMPT/UMPT board to flash slowly (1s on, 1s off), indicating normal operation. Connect your laptop to the BBU's USB port using your cable. Huawei driver packages are typically bundled with the
The specific you are connecting to (e.g., UMPT2, UMPTb, GTMU).
Go to > Advanced options > Startup Settings > Restart .