1. Check if your device is on;
2. Make sure that the device is within the 10-meter range;
3. Check if both devices have Bluetooth enabled;
4. Check for any obstruction that might be blocking the connection;
5. Check if your device is visible to others;
6. Check if the device is compatible with your phone Bluetooth version;
7. Ensure that the device is not already connected to any other device;
8. Restart your phone and the device you are trying to connect to.