Apple has unveiled the iPhone Duo, marking the company's entry into the foldable smartphone market. The device includes a 5.4-inch screen on the outside and a 7.6-inch screen on the inside, allowing users to switch between a compact phone and a larger tablet-like experience.

The phone comes equipped with two rear cameras, Touch ID for unlocking, and an IP68 water and dust resistance rating. Apple has also developed custom software features designed to make iOS work smoothly across the device's two screens when folded and unfolded.