Rumors of Amazon’s first smartphone have been swirling around for a few months, with the device expected to feature multiple front-facing cameras for a 3D user interface that reacts to a user’s motions. Today, Amazon has started sending out invites for a new device launch on June 18, and it looks like we will finally be able to take a look at what the company has been cooking up.

Amazon is teasing the mystery device with a video – you can see people in the video oohing and aahing about what they’re interacting with, while moving their heads around along with the device. Leaked photos showed what looked like cameras on each of the four corners on the front, which combine with the teaser video to confirm that there is going to be something three-dimensional about the experience. One person in the video says “That’s pretty damn intuitive,” which suggests that the 3D UI will also be about functionality, rather than just acting as a novelty factor.

Apart from the unconventional UI, the Amazon phone is expected to be pretty standard in terms of specs, with a 4.7-inch 720p display, Snapdragon processor, 2GB of RAM, and a 13-megapixel camera on the back. On the software front, it is likely to run on a custom version of Android with Amazon’s content stores taking center stage, as has been the case on the company’s Kindle line of tablets.

Amazon isn’t limiting the event to the press – anyone wanting to go can head over to Amazon’s website and request an invitation (well, as long as you’re in the US), though we’re guessing not many common folk will actually get through. But it does look like Amazon wants to entice as many people as it can leading up to the event, and its first smartphone will hopefully be innovative enough to live up to the hype that it looks like it will create in the coming days.