Samsung galaxy s duos is worst phone I have ever seen. I bought it from a local shop. The phone has too many problems. its hang and lag too much. We can’t play games on it and if we play heavy games, it goes switch off automatically. Audio quality is good. but there is no front camera and rear camera’s quality is not too good. Phone’s internal memory which is just 4GB which is not enough for apps. You may have to move your apps to SD card for usage. Overall phone has a lot of problems. We can’t say that this is a good phone.