Black Mamba @Naumitzu44 you have to go through the customer area > My Swisscom > Bills & Costs My Swisscom - Bills & Costs or Overview: Data, bill & contract - Help | Swisscom
LeylaG Hello @Naumitzu44 You can check your use in the Swisscom Cockpit https://cockpit.swisscom.ch/Login/EnterMsisdn/ If you need the details of the outgoing calls and SMS, please note that only the last 31 days are available. The details are sent by post to the owner's address only and cost CHF 5.-. Hope it helps!