For Silent Phone for iPhone version 6.0, there is a default setting, that will cause Silent phone calls to be displayed as a native dialer call in the iPhone call logs. This setting allows Silent Phone incoming calls to be displayed in the same manner as native incoming calls. Some users may not want their Silent Phone calls to be displayed outside of the Silent Phone app. These steps will show how to reset the default setting to prevent this.
Launch Silent Phone and tap the three horizontal bars in the upper left to open your account profile page. This will display the account settings page.
Next, select settings then select user interface.
Now look for native Call Screen support and disable that setting.