Kindly follow the steps listed below if you want to turn on or off this option:
- Go to Apps through Home screen.
- Scroll to Settings, then tap on it.
- Slide the slider next to the Blocking mode option to the right to enable this option, while you can disable this option by slide it to the left.
- Tap Home button to return to the standby mode.
Once you've finished enable blocking mode option on your phone, now you can customize options available under this feature. So, did you have enabled this feature on your phone?