If you are seeing this error while trying to enable or disable Handsfree Telephony, follow these steps in order. 1. Fix via Registry Editor (Highly Effective)

If you need audio immediately and cannot fix the registry immediately, you can disable the specific service causing the error. This will disable the microphone functionality on the headset but restore stereo audio.

This error is rare on Windows 11, more common on Windows 10 after updates. Microsoft has acknowledged it’s a Bluetooth stack negotiation bug — so you’re not alone.

This method addresses the root cause by forcing the Bluetooth User Support Service to start correctly. Press Win + R , type , and press Enter.

Download the app from the Apple App Store

The Parameter Is Incorrect Handsfree Telephony ((install))

If you are seeing this error while trying to enable or disable Handsfree Telephony, follow these steps in order. 1. Fix via Registry Editor (Highly Effective)

This error is rare on Windows 11, more common on Windows 10 after updates. Microsoft has acknowledged it’s a Bluetooth stack negotiation bug — so you’re not alone. If you are seeing this error while trying

This method addresses the root cause by forcing the Bluetooth User Support Service to start correctly. Press Win + R , type , and press Enter. and press Enter.

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