HUAWEI Mobile Connect - 3G PC UI Interface (COM4) Driver

The HUAWEI Mobile Connect – 3G PC UI Interface (COM4) driver helps Windows recognize the PC UI serial interface exposed by compatible Huawei mobile broadband devices. It allows supported connection-management or diagnostic software to communicate with the device, making it useful when this interface appears as an unknown device or shows a warning in Device Manager. Although associated with network hardware, this component is a communications interface rather than the complete mobile broadband connection package.

Key Features

• Device recognition: Helps Windows identify the Huawei 3G PC UI interface and make it available to compatible software.
• Serial communication support: Provides the COM-port interface used by supported Huawei utilities for device management and diagnostics.
• Legacy Windows compatibility: Intended for compatible configurations running Windows 10, 8.1, 7, Vista, or XP; the selected package must match your hardware and Windows architecture.
• Troubleshooting support: Reinstalling the correct driver may resolve missing-interface or driver-related Device Manager errors. The assigned port number can vary, so your device may appear on a port other than COM4.

How to Install HUAWEI Mobile Connect – 3G PC UI Interface (COM4) Driver

1. Check your device and system. Open Device Manager, locate the Huawei interface, and check its hardware IDs under Properties > Details. Confirm your Windows version and whether it is 32-bit or 64-bit.
2. Choose a matching package. Before starting your HUAWEI Mobile Connect – 3G PC UI Interface (COM4) driver download for Windows, verify the package’s supported hardware and operating systems. For Windows 10/11 systems, note that Windows 11 support is not established by the compatibility list above.
3. Download and extract the files. Use a trusted source for a free download, and select the latest version explicitly compatible with your device—not simply the newest package available.
4. Install the driver. Run the supplied installer, if included. Otherwise, right-click the interface in Device Manager, select Update driver, and browse to the extracted driver folder. Follow the prompts without bypassing Windows security warnings.
5. Verify recognition. Restart if requested, reconnect the Huawei device, and check that the interface appears without a warning icon. Test it with your compatible connection-management software.

Keep the driver updated when Huawei provides a compatible release or an update addresses a problem you are experiencing. Confirm hardware and OS compatibility before replacing a working driver, and retain the previous installer in case you need to roll back.