Depending on the country/region and carrier, Galaxy S10e, S10, S10+ and Galaxy Fold are either a dual SIM model or single SIM model. With the dual SIM Galaxy S10e, S10, and S10+ models, you can use two SIM cards at the same time. With the Galaxy Fold dual SIM model, you can use one Nano-SIM card along with one eSIM. 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+.
Galaxy S10e, S10, and S10+ 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 S10e, S10, S10+, Fold, Note9, S9, S9+, Note8, S8, and S8+.
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*Micro SD card sold separately.