To block calls and text messages from all contacts except allowed contacts:
On the quick launch panel in Kaspersky Internet Security's main window, tap Call & Text Filter.
In the Call & Text Filter settings window, tap Filter rules and select Allowed contacts mode.
Create a list of allowed contacts. To do this, on the quick launch panel in Kaspersky Internet Security's main window, tap Call & Text Filter > Allowed contacts.
If necessary, allow calls and text messages from contacts in the device phonebook. To do this, in the Call & Text Filter settings window, select the Allow contacts checkbox.