The Nokia Lumia 1020 (known as Lumia 909 during development) is a smartphone developed by Nokia, first unveiled on 11 July 2013 at a Nokia event at New York. It runs Windows Phone 8, but is also Windows Phone 8.1 ready. It contains Nokia's PureView technology, a pixel oversampling (a data binning technique) that reduces an image taken at full resolution into a lower resolution picture, thus achieving higher definition and light sensitivity, and enables lossless zoom. It improves on Nokia's previous versions of PureView by coupling a new 41-megapixel 2/3-inch BSI sensor with optical image stabilization (OIS), and a high resolution f/2.2 all-aspherical 1-group Carl Zeiss lens. The Lumia 1020 became the most advanced camera phone when released in September 2013. It is the successor of the Nok