Hi
Welcome to Microsoft community.
It seems like you've taken several troubleshooting steps, but the issue with the Hands-Free AG Audio on your JBL TUNE 520 BT headset persists. Here are a few additional suggestions to help you resolve the problem:
- Check Default Communication Device:
- Right-click on the volume icon in the taskbar and select "Open Sound settings."
- Under the "Output" section, ensure that your JBL TUNE 520 BT is set as the default communication device.
- Update Audio Drivers:
- Ensure that your computer's audio drivers are up to date. You can do this through the Device Manager. Right-click on the Start button, select "Device Manager," find the audio devices, right-click, and choose "Update driver."
- Bluetooth Drivers:
- Update your computer's Bluetooth drivers. Go to the Device Manager, find the Bluetooth section, right-click, and select "Update driver."
- Reconnect the Headset:
- Delete the pairing of your JBL TUNE 520 BT from your computer and then reconnect it. Sometimes, re-establishing the connection can resolve communication issues.
- Windows Troubleshooter:
- Run the built-in Windows Troubleshooter for audio problems. Right-click on the volume icon, select "Troubleshoot sound problems," and follow the prompts.
- Check Teams Settings:
- In Microsoft Teams, go to "Settings" > "Devices" and make sure the correct audio devices are selected for both speaker and microphone.
- Contact JBL Support:
- Reach out to JBL customer support for assistance. They may have specific insights or solutions for your headset model and its compatibility with Windows 10.
Best regards
Derrick Qian | Microsoft Community Support Specialist