Nokia Lumia 800 (codenamed 'Sea Ray') is a smartphone from Nokia, first unveiled on 26 October 2011 at the Nokia World 2011 event. It originally ran on Windows Phone 7.5 "Mango" and was Nokia's first device to run the Windows Phone operating system marking the company's shift from Symbian for their smartphones. It was Nokia's flagship upon the original release in Europe in November 2011, and was thus also a highly important product for Nokia's mobile phone business. Lumia 800 shares its design with the previously released MeeGo-based Nokia N9 and it was originally Meego CDMA-variant for Verizon with codename RM-716 Searay. The outward differences are one added physical button dedicated to the camera on the right side of the phone, and a dual LED flash moved directly above the Carl Zeiss camera lens. Despite a similar exterior, the Lumia 800 has a different interior than N9. Lumia 800's chipset comes from Qualcomm, whereas the N9 is based on a Texas Instruments OMAP chipset and CPU. Like the N9, it has a convex-curved Gorilla Glass AMOLED PenTile screen with a ClearBlack antiglare filter. The screen diagonal is 3.7 inches (800 x 480 pixels), compared with 3.9 inches (854 x 480 pixels) for N9, to conform with the Windows Phone specifications list, which includes three capacitive softkeys placed under the glass. A through-colored unibody shell is made from polycarbonate plastic. It was replaced as the flagship by Nokia Lumia 900, which was originally released for the American market through AT&T before its worldwide release. On 5 September 2012, the Nokia Lumia 820, the successor of the Nokia Lumia 800, was presented. The improvements are Windows Phone 8, dual core processor, front camera, wireless charging option, exchangeable covers, and bigger screen. History A "Sea Ray" prototype smartphone was presented by Nokia CEO Stephen Elop at a private gathering in Espoo on 23 June 2011, two days after the introduction of the Nokia N9 in Singapore. The device's design was pretty much the same as the N9, except that it functionally ran on Windows Phone 7.5 ("Mango" update). Elop called on the audience to turn off their cameras because the device was "super confidential", but photos and a full video clip leaked on the internet, leading to reporters calling it naive or cynical. As a result, some in the media believed the presentation to be a "publicity stunt". Software The Lumia 800 device