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New details have emerged about the Windows Phone 'GDR3' update - the last of 2013 - which is said to bring a range of new features, in addition to support for quad-core processors and 1080p displays.

Windows Phone 8.1 may still be months away, but we've had a go at visualising what it might look like, showcased on the fictional Nokia Lumia 1080 phablet. Check it out and share your thoughts.

A series of leaked screenshots appear to reveal a new notifications center in Windows Phone 8, along with various UI changes, including the ability to close background tasks on the multitasking pane.

Sources have claimed that the next Windows Phone 8 update will bring FM radio support, while Nokia plans to introduce a 'flip-to-silence' feature, and a screen double-tap action to wake the device.