Apple has finally unveiled its first ever foldable smartphone, the iPhone Duo. As usually happens these days, the rumors and leaks were all spot on (well, except for the name). The iPhone Duo's screens have the same aspect ratio, and the foldable screen has an under-display selfie camera.The titanium hinge has an integrated magnet array that satisfyingly snaps it shut. Touch ID is integrated into the side button, as you'd expect from a foldable, but you can also unlock the iPhone Duo with your Apple Watch. It has a 7.6" main folding screen and a 5.4" cover display. Both support...