You can also automatically reject anonymous calls (calls with suppressed telephone numbers). If this service is activated, the caller will hear the following message: “This Swisscom customer does not wish to receive calls with suppressed telephone numbers”.
The additional service “Reject anonymous callers” is free of charge.
“Anonymous” is not the same as “Unknown caller”. The latter is the case if the Swisscom exchange does not recognise a caller (for example, for some international calls or calls made over the Internet). These “Unknown callers” can not be suppressed via Service 99 (rejection).