ZTE UI AT Interface (COM4) Driver

The ZTE UI AT Interface (COM4) driver allows Windows to recognize the AT-command interface exposed by a compatible ZTE USB device, so supported software can communicate with it through a serial port. You may need this driver if your ZTE modem or mobile broadband device appears as an unknown device, shows a warning in Device Manager, or cannot communicate with its connection-management software.

Key Features

• USB-to-serial communication: Provides access to the device’s AT-command interface for compatible modem-management and diagnostic applications.
• Device recognition: Helps Windows identify the ZTE interface correctly instead of leaving it listed as an unrecognized USB component.
• COM port access: Enables software to address the interface through an assigned port. COM4 is the port shown in this device name, but Windows may assign a different number after installation.
• Support for older Windows systems: Intended for Windows 10, 8.1, 7, Vista, and XP when the selected package supports your device model and operating system architecture.

How to Install ZTE UI AT Interface (COM4) Driver

1. Confirm your device and Windows edition. Open Device Manager and locate the ZTE interface, which may appear under Ports (COM & LPT) or Other devices. Check its hardware IDs and determine whether Windows is 32-bit or 64-bit.
2. Choose a compatible package. Before starting your ZTE UI AT Interface (COM4) driver download for Windows, verify that the package matches your hardware IDs and Windows version. Use a trusted source for a free download, and select the latest version that explicitly supports your device. For Windows 10/11 systems, note that Windows 11 compatibility is not confirmed by the supported OS list above.
3. Extract and install the driver. Unpack the downloaded archive if necessary. Run the included installer, or right-click the interface in Device Manager, choose Update driver, and browse to the extracted driver folder.
4. Reconnect and verify. Follow any restart instructions, reconnect the ZTE device, and confirm that the interface appears without a warning icon. Set your compatible application to use the COM port currently assigned by Windows.

Keep the driver updated when a compatible release addresses connection problems or improves support for your setup. Before an update, check the package’s compatibility notes; a newer driver is not automatically suitable for every ZTE device or Windows edition.