We recommend that you run the Call Setup Assistant before making voice calls for the first time. You can also try calling US toll-free numbers—numbers that start with “+1800”.

Here’s how to run the Call Setup Assistant:

1. Open the Messenger menu in the main Yahoo! Messenger window, and click Preferences.
2. In the Preferences dialog box, click "Calling & Devices."
3. In the Calling & Devices dialog box, click "Open the Call Setup Assistant."
4. Follow the instructions to test your microphone and speakers and specify your Internet connection.

Running the Call Setup Assistant will ensure that you have a high-quality voice experience within Yahoo! Messenger. You can run the Call Setup Assistant at any time to make sure your microphone and speakers are working properly.