A few photos of the as yet unannounced Lumia 950XL, codenamed Cityman as well as screen shots taken from the up coming Windows 10 Mobile flagship have been leaked on chinese site WPXap showing off the 5.7 inch 2K display along with the MicroUSB Type C port, which is placed just below the sim card slot. You also see the casing which very much confirms this as a prototype device.
No news yet on a release date for this device, but are expecting it to arrive along side a slightly smaller version, the Lumia 950 (codenamed Talkman) which has a 5.2 inch 2K display.
Along with these pictures are three screen shots (below) which reveal the device’s model number as RM-1116. It is running on a later version of the Windows 10 Insider Preview than is currently available to install, build 10240. Along with some pictorial guide we see options for video recording which can be set to 1080p at 90 frames per second. Presumably the Talkman and Cityman will both be capable of recording in 4K video as is currently possible on high end Windows Phone 8 devices.