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Crucially, many detailed specifications remain unknown. Only a handful of these prototype units are believed to exist, and key hardware details like RAM, storage capacity, camera resolution, and battery size are not documented in public sources.

Why Was "Raven" Canceled?

The primary reason for the cancellation of the "Raven" project was Microsoft's $7.2 billion acquisition of Nokia's devices and services business, which closed on April 25, 2014 . Once the deal was finalized, Microsoft owned Nokia's entire Lumia product line, its design teams, manufacturing capabilities, and established supply chain. Developing and launching a competing in-house Surface Phone alongside the newly acquired and already successful Lumia portfolio would have created significant internal conflict, redundant research and development costs, and confusion in the market. Microsoft ultimately committed to the Lumia brand as its primary vehicle for Windows Phone, and the "Raven" project was consequently shelved before it ever reached the engineering validation stage for production .

Comparison to the Surface Duo

The "Raven" project is often loosely linked in the public imagination with the later Surface Duo, but the two devices represent fundamentally different visions and eras for Microsoft's mobile ambitions.

The "Raven" was a traditional monochrome slab running Microsoft's own mobile operating system, conceived before the company owned a major phone hardware division. In contrast, the Surface Duo was a dual-screen Android device built years after Microsoft had effectively exited the Windows Phone market, aimed squarely at productivity with Microsoft 365 integration at its core. While both projects carried the Surface branding vision, they shared almost no engineering, software stack, or design DNA .