Huawei USB AT Device (COM4) Driver

The Huawei USB AT Device (COM4) driver lets Windows communicate with the AT-command interface of compatible Huawei USB hardware, such as certain modems and mobile broadband devices. You may need it if your Huawei device appears as an unknown device, its command interface is unavailable, or connection-management software cannot detect the expected serial port.

Key Features

• Provides access to the device’s AT-command interface, allowing compatible software to request device information and manage supported modem functions.
• Enables Windows to recognize the USB-based serial interface and assign it a COM port. The port number may differ from COM4 depending on your system.
• Supports communication between compatible Huawei hardware and applications that use a serial connection for configuration or diagnostics.
• Offers driver options for Windows 10, 8.1, 7, Vista, and XP, subject to the individual package’s hardware and operating-system requirements.

How to Install Huawei USB AT Device (COM4) Driver

1. Identify your hardware. Connect the Huawei device, open Device Manager, and locate its entry under “Ports (COM & LPT)” or “Other devices.” If identification is unclear, check Properties > Details > Hardware Ids.
2. Choose a compatible package. Before starting your Huawei USB AT Device (COM4) driver download for Windows, confirm that the package matches your hardware ID, Windows version, and 32-bit or 64-bit system type. Use a trusted source when selecting a free download.
3. Extract and install. Unzip the downloaded files if needed. Run the included installer, or right-click the device in Device Manager, select “Update driver,” and browse to the extracted driver folder.
4. Reconnect and verify. Restart Windows if prompted, then reconnect the hardware. Check that the device appears without a warning icon and note its assigned COM port.
5. Configure your software. Select the detected port in your compatible modem or diagnostic application. If it expects COM4 but Windows assigned another number, adjust the application’s port setting.

Keep the driver updated when a compatible release addresses connection problems or improves reliability. Choose the latest version that explicitly supports your hardware rather than assuming every newer package will work. For Windows 10/11 systems, check compatibility carefully: Windows 10 is listed among the supported operating systems, but Windows 11 support is not confirmed here. Before you update a working installation, retain the previous driver so you can roll back if necessary.