CTIA Wireless 2003
The Samsung/Sprint Matrix Phone. Features are as described on this site earlier. The left side button triggers a spring release for the sliding part. What looks like a button on the right side is actually just plastic molding for symmetry. The display and interface are very similar to Samsung's SPH-A500. However, the Matrix phone has far fewer features, and of course an animated Matrix theme pervades the interface.
The back of the Matrix Phone. A headset jack is located behind the earpiece on the sliding part.
Another view. According to the press release, the phone itself will be "prominently featured throughout the movie."