If you encounter this issue, please check the following:
1. Ensure the Smart Dial's Rotate control is correctly set in the Nothing X app under CONTROLS.
2. Verify that your phone is set to synchronize Bluetooth volume with the phone volume (Bluetooth absolute volume). If not enabled, please turn it on in the phone's Bluetooth settings or developer settings.
3. Check if your earbuds are already at the maximum or minimum volume. Try rotating the dial in the opposite direction to see if there is any feedback.