2nd hand usedrefurbised nokia lumia 830 black eewith 12 months warranty samsung with free uk delivery and no contract 127 cm 5 screen size 10 megapixel camera light weight 150 g say hello to your very own personal assistant on the new lumia 830 meet cortana the smartphone assistant who makes life easier for you she keeps track of things that interest you reminds you of meetings gets you to places on time and helps you stay closer to the people who matter most and because cortana