Your new Samsung Galaxy S10 Plus has a nano SIM card which shares a card tray with the microSD card. Needless to say, when you remove your SIM card, the SD card will also be unmounted and vice versa.

Although there are lots of dual SIM phones in the world today, few make the compromise of offering the second SIM card slot with a microSD card slot. This means that you can either use a second SIM ...