If you encounter issues such as poor sound quality, call dropouts, or the microphone not working properly during calls, please try the following:

1. Keep devices close.

Wireless interference and weak network signals can affect call quality.

• Make sure your phone is within 3 meters (10 feet) of the headphones. Avoid having walls or metal obstacles between them.

• Reduce interference by keeping away from Wi‑Fi routers, microwaves, and USB 3.0 devices (such as external hard drives), as they may interfere with Bluetooth signals.

• Ensure your phone has a stable cellular or Wi‑Fi connection during calls.

2. Make sure the left and right earbuds are worn properly and on the correct sides.

Improper wearing can affect microphone direction and call audio clarity.

3. Make sure there is no dust or debris blocking the microphone opening.

The call microphone is usually located on the outer side of the headphones.

Gently clean the microphone area using a soft, dry cloth or adhesive pad.

Note: Avoid using liquid cleaners or sprays.

4. Check device and app permissions.

Call apps must have permission to use the microphone and Bluetooth.

• Go to Phone Settings > App Management.

• Select the app with call issues.

• Make sure microphone and Bluetooth permissions are enabled.

Note: On iPhone, the permission path may differ slightly depending on system version.

5. When using Space 2 with a Windows computer:

• Make sure the microphone input is set to "Hands‑Free" or "Headset" in Windows sound settings.

• If no sound is detected from the microphone, reselect the input device and try again.

6. The headphones may switch protocols during calls, which can cause changes in sound behavior.

If the headphones are simultaneously connected to multiple devices (e.g., a phone and a computer), protocol conflicts may occur. This is because Bluetooth headphones use different protocols for calls (e.g., HFP/HSP) and music (A2DP).

Try disconnecting one device and test calls again.

7. Some software (such as Whatsapp or Zoom) may not be optimized for specific headphones, resulting in the microphone not activating, or sound being intermittent.

8. Disable the headphones' Low Latency or Gaming mode. This may affect call stability.

9. Check whether the call software has microphone and Bluetooth permissions enabled.

• iOS: Settings > Privacy > Microphone

• Android: Settings > Application Permissions

If you encounter any other issues or your issue has not been resolved, please contact us for further assistance.