For questions about the LG Nexus 5, the first phone to ship with Android 4.4 (KitKat). Please only use this tag if you feel your question is specific to the Nexus 5.
The Nexus 5 (codenamed Hammerhead) is a smartphone co-developed by Google and LG Electronics that runs the Android operating system. The successor to the Nexus 4, the device is the fifth smartphone in the Google Nexus series, a family of Android consumer devices marketed by Google and built by an original equipment manufacturer partner.
It's hardware was based on the LG G2.
The Nexus 5 is the reference device used for the Android L Preview release.