Chances are, you might have an issue with the mobile. You can check if the headset is working well using a different mobile. If the issue still persist with an alternate device proceed with replacement as per policy

6.1 Reset you Earphones

1. Make sure your Noise Buds VS303 is fully charged before beginning with the reset

2. Forget / Delete Noise Buds VS303 from paired Bluetooth devices

3. Turn off the bluetooth of the device

4. Open the charging case.

5.Take out the earbuds from the charging case

6. Fast tab both earbuds 5 times and 'Factory reset successful' prompt comes from the earbuds

7.Place both the earbuds inside the charging case

8. Repeat the pairing process