By default, Kaspersky Who Calls blocks only incoming calls from numbers that you have added to your spam list. All other spam calls are tagged as SPAM! Users complained if the number is found in the spam databases, but the app doesn't block them. You can make the app automatically block all spam calls or certain categories of spam calls.
To set up automatic call blocking:
.In this mode, you may miss an incoming call from, for example, your bank, if its number is listed in the spam databases.
The complete list of categories is available only in the Premium version of Kaspersky Who Calls.