Duos 3 launched with reduced feature than duos 2 . RAM reduced 512 MB from 768 MB. applications are not running properly. samsung thinks that they can have a bad hardware and charge premium like apple. battery backup is worst. sound receptions are not working working properly. only the style and design is good. others feature are too bad it is costing a very high charge and not giving the important value of money. do not buy this phone. its really bad and worst.