A mobile phone wall consisting of 200 Lumia 825 phones

At the BUILD 2013 conference, Microsoft did not mention any upgrades for Windows Phone, but still spared no effort in promoting Windows Phone devices. At the venue, Microsoft created a phone wall composed of 200 Lumia 825 phones.

These 200 Lumia 825 phones are all capable of being remotely controlled via a custom application. On the phone wall, they quietly waited, ready to "come alive" with just a single command.