it's not areal.
You should have received a setop box from Swisscom. You need to plug it via HDMI to you TV.
https://www.swisscom.ch/en/residential/internet-television-fixednetwork/subscriptions/vivo-s.html
it's very easy, just check the manual here:
https://www.swisscom.ch/en/residential/help/swisscom-tv/set-up-swisscom-tv.html
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