Hello Feron, thank you for your message.
When the customer activates the Callfilter, each incoming call is compared to a dynamic list. If the caller is on this list, they are blocked directly. The Callfilter works on the same principle as the email spam filter.
Misuse of a customer’s number may result in customer numbers wrongly landing on the Callfilter list. Measures for the recognition and resolution of such cases are planned. The Swisscom Callfilter blocks unfair mass advertising (spam) and other unwanted calls according to the current blocking list. However, it is inevitable that you will continue to receive unwanted advertising calls and in exceptional cases, it is also possible that a desired call will not be transmitted to you.
Hoping to have been able to provide you with some clarification, we wish you a good afternoon.
Cordialement,