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.
Using files known as vCards, you can easily transfer contacts to your Samsung Galaxy S10 from an Android or iPhone. Here are two ways to do it.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results