Handsfree ((link)) Telephony Parameter Is Incorrect < 2025 >

Before trying the advanced fixes, ensure you are following the correct path:

If you’ve ever connected a pair of Bluetooth headphones or a headset to your Windows PC, only to find that you can hear system sounds but your voice won’t go through—or the audio quality suddenly becomes terrible during calls—you may have encountered a frustrating error message: handsfree telephony parameter is incorrect

: Open the Device Manager , expand the Bluetooth section, right-click your Bluetooth adapter, and select Uninstall device . Restart your PC; Windows will automatically reinstall the driver, which often clears the "incorrect parameter" conflict. Before trying the advanced fixes, ensure you are

Open > Hardware and Sound > Devices and Printers . Before trying the advanced fixes