When I purchased Samsung Galaxy S duos 2 S7582, I was satisfied and it functioned well till one year. Later gradually the phone started hanging from time to time and we really felt bad about our decision to purchase the same. As the RAM is low capacity, it operates very slow and most of the time takes much time to load a very simple and light file or software also. The features are good. it I smart looking. price was also fine. Screen had good colour impact and is approximately non brokable if falls from 4 feet height even. Battery life was also fine. Only concern which I mentioned in my earlier details creates problem because nowadays life is fast and we need to have have very smooth functionality phone after all.