Microsoft Surface Duo offers a dual-screen alternative to traditional foldable smartphones

The Microsoft Surface Duo, released in 2020, represents a unique approach to mobile hardware by utilizing two separate displays connected by a 360-degree hinge rather than a single foldable screen. This design allows the device to function as a multi-monitor setup, enabling users to run two applications simultaneously or span one app across both screens. The device runs on Android, marking a shift for Microsoft from its proprietary Windows Phone platform. While the dual-screen configuration offers multitasking benefits, it also presents challenges, as some applications do not dynamically adjust to the split-screen layout, leading to content being cut off. The device includes a bumper for protection, but its design limits the use of traditional cases. The Surface Duo features a single front-facing camera that can function as a rear camera when the screen is rotated. Despite its innovative form factor, the device was ultimately discontinued, reflecting the experimental nature of early foldable technology.

The Microsoft Surface Duo uses two separate displays connected by a 360-degree hinge instead of a single flexible screen. The device runs on the Android operating system, marking a departure from Microsoft's previous Windows Phone platform.

Users can run two separate applications simultaneously or span a single application across both screens for a larger display area. The device's unique design requires specific accessories, as standard phone cases are incompatible with its folding mechanism.

The single front-facing camera can be used as a rear-facing camera by rotating the device's screen. Many applications do not support the dual-screen layout, which can result in content being obscured by the hinge.