Very bad experience. I purchased new Samsung s duos on Feb 2013.....its only 2 month and device have lot of problems.It have 768 MB RAM but after using this I sure it"s just to show because I didnt install much apps even and itS showing 400-500 mb utilized. It hanged too much even some time I was not able to pick calls. Its hand free is also not working properly. I seriously hate this device and will never suggest to anyone to buy any Samsung phone.
Battery back up is also very poor even with single sim it stay maximum 8 hours.