Sierra Wireless AT Command Port (UMTS) (COM6) Driver

The Sierra Wireless AT Command Port (UMTS) (COM6) driver lets Windows communicate with the AT command interface of compatible Sierra Wireless mobile broadband hardware. You may need it if the port appears as an unknown device, modem management software cannot access it, or you are reinstalling a UMTS modem on your PC.

Key Features

• AT command communication: Provides a serial interface that compatible applications can use to query modem status, read device information, and configure supported modem settings.
• Windows device recognition: Helps Windows identify the modem’s AT command port so software can communicate with the correct interface.
• Mobile broadband support: Works alongside other modem components used for cellular connectivity. This port driver alone does not provide a complete mobile broadband connection.
• Legacy Windows options: Driver packages may support Windows 10, 8.1, 7, Vista, and XP. Match the package to your hardware and operating system, including its 32-bit or 64-bit architecture.

How to Install Sierra Wireless AT Command Port (UMTS) (COM6) Driver

1. Identify your hardware and Windows version. Open Device Manager and locate the Sierra Wireless port or unrecognized modem interface. Check its hardware IDs under Properties > Details to help confirm compatibility. COM6 is the assigned port number, not a unique hardware identifier.
2. Choose a compatible package. Before starting a Sierra Wireless AT Command Port (UMTS) (COM6) driver download for Windows, verify the supported modem models and operating systems. Choose the latest version that explicitly supports your device. For Windows 10/11 systems, do not assume a Windows 10 package also supports Windows 11.
3. Download and extract the files. Use a trusted manufacturer or computer-maker source when available. A free download should still be checked for compatibility and a valid publisher signature.
4. Install the driver. Run the supplied installer and follow its instructions. If the package contains only driver files, right-click the device in Device Manager, select Update driver, and browse to the extracted folder.
5. Verify the result. Restart if prompted, then check Device Manager for warning icons. Confirm that your modem software uses the assigned COM port; Windows may assign a number other than COM6.

Keep the driver updated when a compatible release addresses connection issues, improves reliability, or supports a system change. Before an update, review compatibility notes and retain the working installer in case you need to restore the previous version.