Hello Golfi

The Galaxy z flip 7 also supports a physical nano SIM card. Please check this again...

Good evening, in the settings you have the option Add e-SIM. At least that's the case with my iPhone. I bought the Samung for a friend, but it won't be any different. When you add it, you either get a QR code to scan or you can add the e-SIM of any e-SIM supplier directly via the app on your mobile. Confirm everything with yes and it should work like a physical SIM. I do this to have an e-SIM from the respective country before travelling abroad, which is a lot cheaper than the roaming fee. With the iPhone you can add up to 5 e-SIMs. I don't know how it is with the Samsung. You can then select which e-SIM should be used for what. E.g. calls via your Swiss e-SIM and data via a foreign e-SIM when you are on holiday.