According to information collected by Le Temps, telco Swisscom will use SIM card geolocation data to communicate to federal authorities when more than 20 phones are detected in an 100 square meters area. Gathering of more than 5 people are forbidden in Switzerland since March 21.
Data collected by the telco should theoretically only come from public areas and not private building. This data will be anonymised and aggregate before being passed to the health authorities (Office fédéral de la…