Microsoft planned to launch a dual-screen folding Windows Phone

Microsoft’s Surface Duo series is a dual-screen folding phone powered by the Android system, using a book-like folding scheme. Last year Microsoft released the latest Surface Duo 2, equipped with two 5.8-inch AMOLED screens, each with a resolution of 1344 x 1892 (4:3), the refresh rate is 90Hz, with a total size of 8.3 inches and a resolution of 2688 x 1892 (3:2). It is equipped with a Qualcomm Snapdragon 888 5G platform, with 8GB of memory, and 128GB or 256GB of storage space, and can also use the Surface Pen series stylus.

Image: windowscentral

In fact, before Microsoft’s Surface Duo line moved to Android, a secretive Surface device was being developed, a custom-built Windows Phone. The OS, code-named Andromeda, has appeared in Microsoft’s past leaked emails, patents, presentations, and references to the Windows operating system.
Windows Central recently acquired a Lumia 950 running this custom system (Andromeda OS), which shows how far a more modern Windows Phone is from mass production. While Andromeda OS was never designed to work with the Lumia 950, Microsoft engineers used the devices to test certain features of the operating system, a common practice among tech companies developing new devices.
It can be seen from the actual operation that Andromeda OS is still in a very early stage, and Microsoft originally planned to use it for the dual-screen folding Windows Phone. On this Lumia 950, the lock screen can be used as a canvas for taking notes, without having to launch a separate note-taking app to write. The home screen is also another doodle canvas, which Microsoft calls Journal, which supports inking, sticky notes, images, and 3D objects and is always accessible.