Mobile Adapter - PC UI Interface (COM3) Driver

The Mobile Adapter – PC UI Interface (COM3) driver helps Windows recognize the PC UI serial interface exposed by compatible Huawei USB devices. It allows supported connection-management or diagnostic software to communicate with the device through a virtual COM port. You may need it if this interface appears as an unknown device, shows a warning in Device Manager, or is unavailable to your Huawei software.

Key Features

• Enables the Huawei PC UI interface to function as a virtual serial port for compatible applications.
• Provides the USB-to-serial communication layer used by supported device-management and diagnostic tools.
• Supports installation on Windows 10, 8.1, 7, Vista, and XP when you choose a driver package appropriate for your system and hardware.
• Helps resolve recognition problems caused by a missing or incorrectly installed interface driver. The assigned port number may differ from COM3 on your computer.

How to Install Mobile Adapter – PC UI Interface (COM3) Driver

1. Check your Windows version and whether it is 32-bit or 64-bit. In Device Manager, open the interface’s Properties and check its hardware IDs to help confirm that the package matches your Huawei device.
2. Choose a compatible Mobile Adapter – PC UI Interface (COM3) driver download for Windows. Look for the latest version validated for your hardware, and use a trusted source when selecting a free download.
3. Extract the downloaded archive if necessary. If the package includes an installer, run it and follow its instructions, connecting or disconnecting the USB device when prompted.
4. If there is no installer, open Device Manager, right-click the affected interface, and select Update driver or the equivalent option in your Windows version. Browse to the extracted driver folder and complete the installation.
5. Restart Windows if prompted, then reconnect the device. Check that the interface appears without a warning icon and select its assigned COM port in your compatible software.

Keep the driver updated when a compatible release addresses connection issues or improves reliability. For Windows 10/11 systems, verify support separately: Windows 10 is listed for this device, but Windows 11 compatibility is not confirmed here. Before you install an update, retain a copy of the working driver so you can restore it if necessary.