LG D850 is supposed to be one of the many variants of the yet to be announced LG G3. More exactly, it’s said that this is a model made for AT & T.
The UA Profile for LG D850 does appear to confirm that it will be a flagship device. According to LG D850’s UA Profile entries, The device will come with a WQHD (2560×1440) display. It also shows that it will support LTE, HSPA, EDGE and GPRS connectivity.
There’s no evidence to show that the D850 is the LG G3, but a device with 2560×1440 display is definitely LG’s flagship smart phone for 2014.
LG could launch the LG G3 as early as May according to more recent rumours.
Source: LG D850 UA Profile http://gsm.lge.com/html/gsm/D850-M10-D1.xml