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Unlike the stock home screen, Google Now Launcher is not a component of Android itself; it is implemented as part of the Google Search application.The Nexus 5 was the first Android device to ship with Android 4.4 "Kit Kat", which had a refreshed interface, improved performance, improved NFC support (such as the ability to emulate a smart card), a new "HDR+" camera shooting mode, native printing functionality, a screen recording utility, and other new and improved functionality.
The Nexus 5 supports LTE networks where available, unlike the Nexus 4 which unofficially supported LTE on AWS Band 4 only with a hidden software option, but was not formally approved or marketed for any LTE use.Notable new hardware features also include two new composite sensors: a step detector and a step counter.Its hardware contains similarities to the LG G2; it is powered by a 2.26 GHz quad-core Snapdragon 800 processor with 2 GB of RAM, either 16 or 32 GB of internal storage, and a 2300 m Ah battery.The Nexus 5 uses a 4.95-inch (marketed as 5-inch) 4p IPS display, and includes an 8-megapixel rear-facing camera with optical image stabilization (OIS), and a 1.3-megapixel front-facing camera.
These new sensors allow applications to easily track steps when the user is walking, running, or climbing stairs.
Both sensors are implemented in hardware for low power consumption.