We have not taken part in this manufacturer's promotion. Therefore, purchases from us are not valid for this promotion, and most of our third-party retailers are also not participating in this promotion. All participating suppliers can be seen here https://images.samsung.com/is/content/samsung/assets/ch/tnb/TNBs_GalaxyWatch_HolidayPromotion_de_COM.pdf

- yes -yes - esim - with any Android

It isn't as straightforward. You need a Samsung phone to pair and setup the app. does not pair with iPhone. Once setup, eSim can be enabled(recommend Sunrise/Swisscom/ other shops doing it for you)

There is no SIM slot, only e-SIM. Yes you can make calls with the watch without the mobile present.Yes the watch has GPS and you can locate it. The Samsung Health app for example can log the route you have talken on a workout.

i have no Tattoos, but i did own the watch 4,5 and 6 and the sensor looks the same (same green light) . Also the functionality does not really differ. So my guess would be, if 4 did not work 6 also will fail.