Recently Nokia released 8-minute video explaining design considerations of Lumia. The video describes various design and construction efforts including Lumia 800 shell, antenna design and its curved look.

http://www.youtube.com/watch?v=QvnDunLJSPE

Nokia Lumia 800 is powered by Windows Phone, but interestingly different from all other Windows Phones. The 3 essentials buttons – Back, Windows and Search – have been implemented as a part of screen in Nokia Lumia 800 and it wouldn’t have been possible without seamlessly collective collaboration with Windows Phone team at Microsoft, said Nokia.