By default, Kaspersky Who Calls marks incoming spam calls as SPAM! but doesn't block them. You can configure the app to block all spam calls automatically, block selected categories of spam, or not block them.
The full list of spam categories is available only in the Premium version of Kaspersky Who Calls.
Block all spam calls. Calls belonging to the spam categories you specify below on this screen will be blocked automatically. Blocked calls will appear in your call log.
Block selected categories. Calls from spam categories specified by you below on this screen will be blocked automatically. Blocked calls will be shown in your call log.
The call blocking mode applies to both cellular calls and messenger calls.
You can also block calls from foreign numbers in Kaspersky Who Calls. This feature allows you to block phone numbers of incoming calls that aren't from the country you specified when setting up the app.
If you sign in to a foreign app or service, a verification call may be blocked. Make sure you turn off this feature before you sign in.