Claimed to be the firm's thinnest and lightest high-end Windows Phone yet. In a bid to take on Samsung and Apple, Nokia released its Lumia 830 at IFA in Germany earlier this September, at its first event as part of Microsoft after the Redmond firm bought Nokia's devices division a year ago. The Lumia 830 adds to the firm's recently announced models such as the Nokia Lumia 530 and Nokia Lumia 630.