The same guy, who initially posted unboxing video of AT&T bound Lumia 900 has now posted walk-through of Lumia 900 as promised. He seems much impressed with smoothness of Windows Phone OS and simplicity of the UI.
Also noteworthy is the presence of Internet sharing and Tango video calls apps, unavailable on Lumia 800 and 710.
Check the video,
[youtube=http://www.youtube.com/watch?feature=player_detailpage&v=Z2Uyvcj35nE]
