The LG D821 device which has been spotted at Wi-Fi Alliance database, Bluetooth SIG Website and FCC listings is not the LG G2 Variant.
Now we can confirmed that The LG D820 / LG D821 is the Google Nexus 5. The LG D820 is the American version of the Nexus 5, and the LG D821 is the European version of it.
The LG D821 / LG D820 will launch in North America and Europe, including the UK, before reaching other area and countries.
According to leaked information from myce.com, The Google Nexus 5 is expected to ship with following Specs:
[Rumored Specs] LG D821 Nexus 5
LTE (B1, B3, B5, B7, B8, B20)
Display: 5-inch Full HD display (1920 X 1080 Pixels)
Processor: Quad Core 2.3GHz Qualcomm Snadragon 800 (MS8974 chipset)
SIM Card: Micro SIM
Internal Storage: 16GB LPDDR3
Camera (rear): 8MP OIS Camera
Camera (front): 1.3MP VT Camera
Battery: 2300mAh and wireless charging
Other: LTE, NFC,Bluetooth 3.0,Wi-Fi,HDMI,
Thanks to Droid-life.com & macrumors & myce.com, Here are some pictures of the Google Nexus 5:
Photo Credit: Droid-life.com