Andromeda OS Archives

Winsage

December 31, 2025

You can now try the Windows phone OS that Microsoft never released

Microsoft had plans for a custom operating system called Andromeda OS, designed for dual-screen devices, which was ultimately shelved. A leaked build of Andromeda OS has been ported to the original Surface Duo by developer Gustave Monce, allowing users to experience this unfinished software. Andromeda OS was based on Windows 10 and resembled Windows Phone, featuring Live Tiles and a Start Menu for dual displays. The project was abandoned in favor of Android in 2018 to avoid rebuilding a mobile app ecosystem. The ported build is not compatible with Surface Duo 2 and is available for download, but installation will erase existing Android data and may not be suitable for beginners. The device can run both Android and Windows, but booting into Windows requires a PC connection. The current version of Andromeda OS is unstable and incomplete, providing insight into Microsoft's previous mobile technology aspirations.

Winsage

December 29, 2025

Microsoft’s canceled dual-screen version of Windows Phone has leaked, and you can now try it on a Surface Duo

Andromeda OS, originally conceived by Microsoft in 2018 for a dual-screen phone, has been revived by developer Gustave Monce, who successfully ported a leaked build to the Surface Duo. The OS was intended to provide a new smartphone experience, featuring a home screen for note-taking and seamless navigation with gestures. Applications can open on one display and be dragged to another for multitasking. Monce has packaged the OS into a user-friendly FFU file for installation, although it is still unfinished and may have bugs. Installing Andromeda OS will erase existing Android data, but a dual-boot option is available with data loss risks. Monce has previously ported Windows 10 and 11 to the Surface Duo, highlighting Microsoft's dual-screen ambitions.