The Silent Ringtone is the easiest way to disconnect from certain people.
If you are in a situation where you need to screen calls from unwanted callers, such as stalkers or telemarketers the Silent Ringtone is probably what you need. Once installed you can easily set this silent sound to any saved or unknown number (in this case it should be your default tone and the group of your known contacts is set to a hearable sound). The Silent Ringtone is the easiest and most affordable way to disconnect from disturbing people. And there is one more thing...the Silent Ringtone can also be set as silent text tone.