The LG D820 may just have been reaffirmed as the the Nexus 5, with the LG D821 passing through FCC. The LG D821 is a GSM phone with nearly same measurements as the LG G2.
Even @evleaks has corrected themselves :-
Happy to say it looks like I was wrong about the LG D820/D821…
— @evleaks (@evleaks) September 11, 2013
Looks like we do in fact have a lot of details about the Nexus 5 than it would be appropriate before release.
Source:-phandroid