Make sure your headset and the mobile device are within the 10m range to each other
Low battery level may cause the disconnection from the mobile
If the battery level is less than 5% charge the Earphones
If the battery level is more than 5% proceed with the next step
Note: Visibility of the battery level is subjective and may vary brand to brand
Sound problems may occur due to an issue with the Music player, try playing the same track with a different music player to notice a difference.