You can feel that audio quality is poor or sound volume was lower than before.
Please check below items firstly.
• Wireless network services may be disabled due to issues with the service provider’s network. Ensure to keep the ear buds away from electromagnetic waves.
• Ensure that your ear buds and the other Bluetooth device are within the maximum Bluetooth range (5 m). The distance may vary depending on the environment the devices are used in.
• You may experience drops in volume or noise depending on the connected device’s volume.
To avoid this, appropriately adjust the connected device’s sound.
Otherwise, If your ear buds are dirty with dust or earwax, or anything else, please follow below steps to clean them for clear sound.
● Basic maintenance: