Cause：
1. The phone's Bluetooth is not turned on
2. The earbuds automatically reconnects to the last connected device by default, your earbuds was not connected to this phone last time.
3. The phone is far away from the earbuds, exceeding the effective transmission distance (10m), or there is an obstacle between the earbuds and the phone.
4. Due to the special nature of Bluetooth earbuds, electromagnetic waves in your area may interfere with the Bluetooth connection.
5. The copper column on the bottom of the earbuds is dirty.
Solution:
1.Turn on your phone's Bluetooth
2. If it is not the last phone connected, please pair the connection again.
3. Put your phone and earbuds together and reconnect.
4. Make sure your earbuds are not in an environment with strong interference, away from objects with strong electromagnetic interference such as microwave ovens.
5. Clean the copper pillar at the bottom of the earbuds and re-pair them.
6. If none of the above resolves the problem, remove the left and right earbuds from the charging case and wear them while triple-clicking the touch control field on the left and right earbuds to force pairing.
7. If none of the above resolves, try to restore the factory settings by taping the left and right ear touch control five times in a row at the same time within 30S (not when playing music or calling), and when you hear a beep, the factory settings are restored.
