Samsung Galaxy S Duos S7562 Quad-band GSM Android Smartphone - White - Unlocked Dual SIM Always On - Dual SIM Always On is a revolutionary service that ensures you never miss a call. Samsung's Dual SIM service allows you to receive calls while you are connected to the internet or even if you are already talking on the phone on the other SIM card. Maximize the benefits having always having 2 SIM cards available to you at the same time! Fast & Powerful - The 1GHz CPU enables this mobile to handle advanced operations with speed and grace. Effortlessly switch back and forth between applications as you multi-task with no lag time! There's no waiting around for anything with this mobile! Exciting Entertainment with 4 Large Display - No need to squint while trying to read text! Don't lose the detail when viewing photos or videos! The large 4 display can comfortably accommodate web pages, long emails, detailed photos and videos. Everything is portrayed crystal clear with brilliant imagery. Specifications - OS - Android OS, v4.0 Ice Cream Sandwich