The Galaxy S Duos is a dual-SIM smartphone from Samsung, which means that it can be operated with two different SIM cards simultaneously. The smartphone was shipped with Android 4.0.4, together with the manufacturer's trademark TouchWiz user interface. The internal memory of 4 gigabytes is rather small, but it can be expanded up to 32 gigabytes using a microSD card. The Galaxy S Duos is a smartphone for beginner users who have a need for dual SIM operation. The device was originally released in September 2012.