Nexus 5 - LGD821 - Over the Air Upgrade :
Nexus 5 supports software upgrade over the air. This is generally called G-OTA
This can be done as per the below process
After one upgrade, a user can click again on the "Check Now" option to see if some other upgrade
When the prompt "Your System is upto date" appears, it means the handset has the latest available
version from google.
If the problem is not resolved, please call LG Support representative on 1800-180 -9999 (Toll Free)
or any loss or damage whatsoever arising from loss of data or profits arising out of or in connection with the use of this informational video.