Nokia's upcoming Lumia 1520 (codenamed 'Bandit') has been revealed in a leaked photo, showing a massive 6-inch 1080p display that dwarfs the Lumia 1020 beside it. Windows Phone Central obtained the image of the device, which they believe to be accurate, that also shows a potential snap-on flip-cover accessory for the phablet, similar to accessories available for current Lumia devices.

Rumored specifications for the device include a quad-core Qualcomm Snapdragon chipset, most likely either a Snapdragon 800 or Snapdragon 600 model from their latest range, and a 20-megapixel PureView camera. Unlike the recently-released Lumia 925, Nokia is expected to make the Lumia 1520's body out of polycarbonate with a reasonably thin bezel.

To accommodate the 1080p display, the 1520 would come preloaded with a new version of Windows Phone 8, GDR3, that will bring support for larger and higher density displays. As seen in the leaked image above, the Start screen will support a three-column grid of Live Tiles, and other changes are expected.

Nokia will reportedly announce this device at an event in New York at the end of September. It will allegedly be seen alongside Nokia's upcoming 10.1-inch Windows RT tablet, codenamed 'Sirius', that was recently spotted in leaked images.

Both the Lumia 1520 and Sirius tablet would be targeting markets new to Nokia, as they currently only sell devices in the high-end segment (the Lumia 925 and Lumia 1020) and the entry-level/mid-range segment (the Lumia 520 and Lumia 720). It'll be interesting to see how the devices compete in increasingly crowded tablet and phablet markets, alongside big guns like the iPad and Galaxy Note.