What should you do if a customer reports a yellow exclamation mark next to the WWAN device driver in Windows Device Manager?

The presence of a yellow exclamation mark next to the WWAN device driver in Windows Device Manager indicates that there is an issue with the driver. This could be due to an outdated, corrupted, or incompatible driver. Locating and installing the latest known good driver is the appropriate action as it can resolve the issues by providing the necessary updates or fixes that support the functionality of the device.

Installing the latest driver ensures that any known bugs are addressed and that the device can interact properly with the operating system. This is particularly important for WWAN devices, as they rely on specific drivers to function correctly and maintain connectivity.

Updating the operating system may not directly resolve the driver issue, as the driver itself may still be incompatible or outdated even with a new OS. Restarting the computer could temporarily resolve issues, but if the driver is fundamentally flawed, this action will not provide a long-term solution. Checking for hardware conflicts is worthwhile in some cases, but without addressing the driver itself, any conflicts will likely persist. Thus, installing the latest known good driver offers the most direct approach to fixing the problem.