Telephony Parameter Is Incorrect __full__ - Handsfree

The "Handsfree Telephony parameter is incorrect" error typically occurs on Windows 11 or 10 when users try to re-enable the service for a Bluetooth headset after previously disabling it . This service allows your headset to act as both a microphone and a low-quality speaker for calls, but disabling it is a common fix for "muffled" audio in high-quality stereo mode.

If any are set to "Disabled," double-click them and change the to Manual or Automatic . 3. Reinstall Bluetooth and Sound Drivers 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. expand the Bluetooth section