Most users want to disable this feature because it causes Bluetooth headphones to sound "muffled" or like a low-quality phone call when an app (like Discord or a game) tries to use the microphone.
In Windows 11, "telephony" usually refers to the feature for Bluetooth devices. This feature often lowers audio quality when the microphone is active. You can disable it for a specific device or turn off the system-wide service to prevent it from re-enabling automatically. Method 1: Disable for a Specific Device how to turn off telephony windows 11
If your settings keep reverting after a restart, you can disable the core Windows service that manages these connections. Most users want to disable this feature because
: Scroll to the bottom and click More devices and printer settings . how to turn off telephony windows 11