If one earbud cannot connect when using the Xiaomi OpenWear Stereo Pro, please refer to the following troubleshooting methods:
1. A system firmware issue may cause the connection to fail. Ensure that both the earbuds' firmware and the Xiaomi Earbuds App are updated to the latest version.
2. A dead battery in the earbuds will cause the connection to fail. Please ensure that the earbuds have sufficient power.
3. Place both earbuds in the earbud case, wait a while, and then reconnect them to see if the problem is resolved.
4. Connecting to other devices can also cause connection failures. Turn off Bluetooth on other devices to ensure that only the current device is connected.
5. Test the left and right earbuds separately. If one of them fails to connect, it may be a hardware problem.
6. Reset the earbuds and re-pair with your phone, then check if the problem is resolved.
7. If the above troubleshooting fails, the issue may be caused by a hardware failure. We would request you to go to the local official after-sales center for further assistance.