I have purchased ##samsung galaxy grand duos## 1 year back, it was 1 of mistake I have done, after 2 months of use phone started getting hang. It was like I use to visit service center twice in a month. Samsung service center is worst, they only have 1 solution for everything n that is formating your phone. My samsung grand duos was so bad experience that I said Big No to samsung from that time.
So people, please read the review, watch tech shows before purchasing any electronic products.