The Samsung Galaxy S Duos 2 is a budget Android smartphone, released in November It has a 4" TFT x display, GHz dual-core processor and MB of RAM. It comes with 4GB internal storage, 5MP camera and is powered by a mAh battery. But, the users are running Custom ROM (e.g. KyleOpen ROM) on their device; they have to install the Stock ROM on Galaxy S Duos GT-S to get the device warranty back! Today, in this article we will provide you the Original Stock ROM for Galaxy S Duos and also the method to install it. Surely, we will help you to get back your Official Stock. Sep 30, · Tech Specifications Review: Samsung Galaxy S Duos 2 Model Name Samsung Galaxy S Duos 2 Code GT-S Physical Width mm Height mm Length mm Weight g Network Multi-SIM Dual-SIM SIM Size Standard Mini SIM (2FF) Infra 2G GSM, 3G WCDMA 2G GSM GSM, GSM, DCS, PCS 3G UMTS B1(), B8(). custom ROMs and Kernels are not official methods. So, neither device. These are the instructions to root Samsung Galaxy S Duos 2 GT-S using pre -rooted Stock Rom (original firmware). Requirements: Your Samsung Galaxy. Galaxy S Duos 2 S has been updated with another Jelly Bean firmware How to Install Galaxy S Duos 2 S XXUANG1 Android Stock Firmware.