You have to buy the Galaxy S10 unlocked if you need dual SIM functionality

Best answer: Yes, there is a version of the Galaxy S10 with dual SIM slots, but you'll have to buy it unlocked because the U.S. carrier models only support one at a time. Amazon: Samsung Galaxy S10 (Unlocked) ($900) Dual SIM Galaxy S10 vs. Single SIM Want another line for your smartphone? That's where dual SIM comes in, although things get complicated if you want that on the new Galaxy S10. There aren't many differences between the dual SIM and single SIM versions of the Galaxy S10. They both ha...