Depending on the country/ region and carrier, Galaxy S9, Galaxy S9+, and Galaxy Note9 are either a dual SIM model* or single SIM model. With the dual SIM model, you can use two SIM cards at the same time. Whether you want separate numbers for work and home or you need a local number while keeping your original line open when in a foreign country, the dual SIM feature comes in handy. This convenient feature was first introduced on Galaxy S8 and S8+.
Devices that support dual SIM provide one SIM slot and one Hybrid slot, meaning that you can have either two SIM cards to use the dual SIM feature or one SIM card and one microSD card for expandable memory.
MicroSD is supported on Galaxy Note9 S9, S9+, Note8, S8, and S8+.
Discover more about Galaxy for yourself.
*Galaxy S9, S9+, and Note9 offer 4G+4G DSDS and Galaxy Note8 supports 3G+4G DSDS.
*Micro SD card sold separately.