Dual sim card and external memory card supported as well. Only used a couple of times. Will work on any GSM SIM card in the world.The item "Samsung Galaxy S7 Dual SIM 32GB Unlocked Smartphone 5.1 AMOLED Display 4GB RAM" is in sale since Saturday, June 25, 2016. This item is in the category "Cell Phones & Accessories\Cell Phones & Smartphones". The seller is "usmanmanzoor1981" and is located in Alexandria, Virginia. This item can be shipped to United States.