Apple has officially unveiled its long‑rumored foldable smartphone, the iPhone Duo, in a product reveal that highlighted a new approach to mobile design and biometric authentication.

The Duo features a 5.4‑inch outer display that unfolds into a larger 7.6‑inch inner screen. Apple describes the inner panel as having a “nano‑texture” finish and notes that the device has “barely any visible crease,” suggesting a smooth transition between the two surfaces. The phone also carries a dual‑camera setup, with a primary lens and a second, unspecified camera positioned on the rear.

In a departure from the Face ID system that has dominated recent iPhones, the Duo uses Touch ID embedded in the power button for unlocking and authentication. This change reflects Apple’s ongoing experimentation with new form factors and biometric methods that can operate reliably on a folding screen. The company also emphasized that the foldable design could support multitasking and media consumption in ways that a single flat screen cannot.

While the announcement did not include pricing or release dates, the iPhone Duo’s introduction marks a significant milestone for Apple’s hardware roadmap. By combining a foldable display with a proven biometric sensor, Apple may be positioning the Duo as a bridge between its current lineup and future devices that could feature even more flexible or modular designs.