Apple has announced the iPhone Duo, a foldable iPhone with a titanium frame and hinge cover, a 48MP Dual Fusion camera system, and a large display. The device is available for pre-order starting October 16th and will be available starting October 23rd. The iPhone Duo has no SIM slot, instead using eSIM, which may be a limitation for some users. The device also supports the Apple Pencil and has a new design with a foldable screen.