2. Ensure the volume is turned up on both your phone and the headphones.
3. Ensure the headphones and your phone/device are connected.
4. Ensure the distance between the headphones and your phone/device is within the optimal range for Bluetooth stereo.
If the above points are met, and you are still experiencing connection issues, you can try to resolve the problem by performing a soft reset and possibly deleting the headphones from the device's Bluetooth memory. Please refer to the video guide for your product further up the page.