To block calls and text messages from blocked contacts only and allow calls and text messages from other contacts:
On the quick launch panel in Kaspersky Internet Security's main window, tap Call & Text Filter > Filter rules.
In the Filter rules screen, tap Blocked contacts.
Create a list of blocked contacts. To do this, on the quick launch panel in the main window of Kaspersky Internet Security, tap Call & Text Filter > Blocked contacts.
If necessary, enable automatic blocking of text messages from numbers containing letters:
In the main window of Kaspersky Internet Security, tap > Call & Text Filter.