Samsung Galaxy S Duos 3 model is not that much good. main problem of this phone is it have only 512 mb internal memory because of tat it will become hang vary soon. it only have 3 mega pxil camera this is also a main dis advantage of this phone.this phone only have 1500mAh battery. While playing any game or wile using internet the phone will become vary hot. It does not have any friend camera.its processer is slow it will leed to the system hang.