iPhone Duo hands-on: Apple's most exciting device in a decade

The iPhone Duo makes a great first impression, I just wish it had three cameras in back.

The iPhone Duo makes a great first impression, I just wish it had three cameras in back.<p><img src="https://www.engadget.com/img/gallery/iphone-duo-hands-on-apple-s-most-exciting-device-in-a-decade/intro-1788993120.jpg" /></p>