HSPA Mobile Connect AT Device (COM3) Driver

The HSPA Mobile Connect AT Device (COM3) driver helps Windows recognize the USB-connected modem’s AT-command interface, allowing compatible software to communicate with the device through a serial port. It is intended for users setting up an Hspa mobile broadband device or troubleshooting an unrecognized AT interface in Device Manager.

Key Features

• Enables AT-command communication between supported modem software and the device for configuration, status checks, and other modem-control functions.
• Provides a virtual serial interface identified here as COM3; Windows may assign a different COM number depending on your system.
• Helps resolve missing-driver warnings for the AT interface when the correct package is installed.
• Supports installation on Windows 10, 8.1, 7, Vista, and XP with a package matched to your operating system and hardware. Other modem functions may require separate drivers or connection software.

How to Install HSPA Mobile Connect AT Device (COM3) Driver

1. Confirm your device and Windows version. Open Device Manager, locate the modem’s AT interface or unidentified USB device, and check Properties > Details > Hardware Ids. Also confirm whether your Windows installation is 32-bit or 64-bit.
2. Choose a matching package. Before starting your HSPA Mobile Connect AT Device (COM3) driver download for Windows, compare the package’s supported hardware and operating systems with your PC. Look for the latest version compatible with your device, not simply the newest available file. Windows 10/11 compatibility should not be assumed: Windows 11 is not listed among the supported systems here.
3. Download and extract the files. If a free download is available, verify its source and scan the archive before opening it. Extract compressed files to an easy-to-find folder.
4. Install the driver. Run the included installer, if provided, and follow its connection instructions. For a manual installation, right-click the device in Device Manager, select the driver update option, and browse to the extracted folder.
5. Check the result. Restart if prompted, then confirm that the device appears without a warning icon. If your modem software requires a port selection, choose the COM number currently shown in Device Manager.

Keep the driver updated when a compatible release addresses a connection problem or improves system compatibility. Before an update, retain a working driver package or create a restore point so you can recover if needed. A driver update supports device communication but does not replace a mobile data subscription or guarantee better signal strength.