Callfilter
Unwanted advertising calls continue to be a nuisance, but for Swisscom customers, the protection against them is improving all the time. Since 2016, Callfilter has blocked hundreds of thousands of spam calls a day and become a default feature for all residential customers (on mobile and fixed networks). Now, however, Swisscom has developed the protection even further and introduced additional functions.
Advertising calls are still prolific but Swisscom’s Callfilter provides effective protection against them. In October alone, it blocked around 8.4 million unwanted spam calls, double the number blocked in March of this year. As reported in March, there has been a drive over the last few months to activate Callfilter for all existing Swisscom residential customers on the mobile network. The customers concerned have been informed of the activation by SMS. As a result, all mobile residential customers now benefit automatically from the protection afforded by Callfilter, without any action on their part. In the first quarter of 2026, automatic activation will also apply to the secondary and tertiary brands (Wingo, Migros Mobile and Coop Mobile). Callfilter will therefore be activated by default for all Swisscom’s mobile products (including prepaid) in future, to ensure protection for customers.
From October, mobile customers are now able to take advantage of the functions enjoyed by fixed network customers: ‘block anonymous calls’ and ‘block calls from unknown numbers’. These were previously only available on the fixed network. Customers can now use My Swisscom on their mobile phone to specify which calls they would like to allow through – giving them even more control and security.
The Swisscom Callfilter detects and blocks unwanted advertising calls automatically using modern algorithms and information from a continuously updated database. New telephone numbers and suspicious call patterns are routinely analysed to maintain the highest level of protection for customers. In addition, customers can store up to 200 numbers in their personal block list.