Apple is able to block calls rigorously and perfectly, and does not display blocked calls in the call log. At no point do you find out when you receive a call that has been blocked by the device.
However, the Clever Dialer spam database also includes phone numbers that some users do not consider spam. This includes, for example, Sky (Keyword: customer recovery), or some insurance companies. Apple offers no countermeasure possibility by means of an exception list (whitelist) on which such phone numbers could be deposited.
For this reason, we have decided to offer the automatic blocking of spam calls as a separate function, which you can activate if you wish. As long as you do not activate the automatic blocking, Clever Dialer will (only) warn you of such calls. You can then decide yourself whether you want to accept the call or not.
TIP: If you want to receive calls from a certain spam phone number even though the blocking function is activated (e.g. Sky), you can simply save the respective phone number in your contacts. The call will then no longer be blocked.