Mobile Adapter - ETS Application Interface (COM4) Driver

The Mobile Adapter – ETS Application Interface (COM4) driver helps Windows recognize and communicate with the application interface exposed by a compatible Huawei mobile adapter. You may need it if this interface appears as an unknown device in Device Manager, shows a driver warning, or is unavailable to the Huawei software that uses it.

Key Features

• Huawei interface recognition: Enables Windows to identify the adapter’s ETS application interface rather than leave it listed as an unrecognized device.
• COM-port communication: Provides the driver support needed for compatible applications to access the interface through its assigned serial port. COM4 is the port shown in this device name; Windows may assign a different number after reconnection or installation.
• Legacy Windows support: Intended for compatible configurations running Windows 10, 8.1, 7, Vista, or XP. Select a package that matches both your Windows release and its 32-bit or 64-bit architecture.
• Troubleshooting support: Installing a matching driver can help resolve missing-driver errors, although connection problems may also involve USB cables, ports, or application settings.

How to Install Mobile Adapter – ETS Application Interface (COM4) Driver

1. Check your system and device. Confirm your Windows version and architecture. In Device Manager, open the interface’s Properties and check its hardware IDs to help verify that the package matches your Huawei adapter.
2. Choose the appropriate package. Before starting the Mobile Adapter – ETS Application Interface (COM4) driver download for Windows, review the listed compatibility information. Look for the latest version that explicitly supports your hardware and operating system. A free download should not require unrelated software.
3. Prepare the files. Extract the downloaded archive if necessary. If replacing an existing working driver, consider creating a restore point before making changes.
4. Install the driver. Run the supplied installer, if included, and follow its connection instructions. Alternatively, use Device Manager’s Update driver option and browse to the extracted driver folder.
5. Verify operation. Restart if prompted, then check Device Manager for warning icons. Confirm the assigned COM port and select that port in your compatible application if required.

Keep the driver updated when a compatible release addresses a problem or improves support for your setup. For Windows 10/11 systems, verify each OS separately: Windows 10 is listed as supported here, but Windows 11 compatibility is not confirmed. Avoid an update intended for a different Huawei interface, even if its name looks similar.