In the Galaxy phone headquarter store in Shibuya, Japan, Samsung used 1000 phones to create a lighted facade, or building face.

Photo seen here.

Tokyujin Yoshioka is the designer of the facade and the idea was to program each phone so that it would blink and light up and create a kind of light show. The phones extend about 4 stories high. Tokyujin designs all sorts of things, including The TOKYO 2020 Olympic Torch!

Read this article about it.