I was looking to gift a mobile phone to my sister on her birthday. And as per my budget is concernet three mobile's are falling under my budget mainly one in Nokia and the two most popular Samsung phone as Nokia Asha 311, Samsung Galaxy Y, Samsung Galaxy Y Duos. But picking these up i didn't make up my mind as to which one to buy. I need some suggestions, please suggest sensible suggestions with their technical specifications. Please, make it as soon as possible.