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

In case you are still facing issues you can unpair the device from your mobile with the following steps: 

1. Tap and hold the Bluetooth icon on your mobile

2. Tap on "Noise Airbuds"

3. Forget / Delete Noise Airbuds from paired Bluetooth devices