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Why not sound does the Bluetooth Earphone

Possible the reason
1:The volume of the phone is not suitable, the volume has been adjusted to a mini mum, causing the Bluetooth earphone to have almost no sound.
2. The Bluetooth earphone is not properly connected to the phone. This situation will also cause the Bluetooth earphone to have no sound.
3. Bluetooth earphone is not within the limited working range

Solution way:
1、Adjust the volume on your phone
2. please reconnect Bluetooth and mobile phone , maybe the Bluetooth earphone horn has sound

3. Keep the earphones and mobile phones in a range of 10 meters. Do not block obstacles between them.

1. Do not perform other operations when searching for Bluetooth to prevent program errors.
2. To ensure the best use, please keep the earphones in working use range