Search engine giant Google has reportedly begun rolling out the new KitKat OS update to the 2012 flagship smartphone LG Nexus 4.

Being an affiliate of Google, all nexus devices have the privilege of being the first to receive the latest firmware updates among all Android devices. Staying true to that, today 238 MB v4.4 KitKat OS (build version: KRT16S) software with bug-fix has been made available to the LG Nexus 4 via OTA (Over-The-Air), reported Android Central.

Like all new firmware roll out procedure, the process is executed in phases, hence Nexus 4 as well as Nexus 7 (2012 and 2013 models) and Nexus 10 tablet owners in some regions may receive the update a little late.

As of now, v4.4 KitKat OS has also been pushed out to Google owned Motorola phone Moto X in US, whereas Nexus 5 which went on sale in India just few hours ago, ships with the new OS out-of-the-box.

Key improvement brought in to the v4.4 KitKat OS update:

Improved Caller-ID: If a caller receives a call from unknown number, the phone will look for matches on the net with local listings via Google Maps.

Priority Contacts: The new OS empowers the phone to automatically prioritise contact list for easy access, based on the frequency of the peoples' contacts to which users talk.

Immersive display: To enhance entertainment factor, the new  OS comes with immersive mode, where the status bar and navigation buttons disappear in to the back ground while you play music, games and read e-books. Users can just swipe the edge of the screen to bring back the utility buttons.

Enhanced Message grouping: Taking a leaf out of Apple's iMessage feature, Google has brought in some improvements to the new Hangouts app. Users can now find all their text SMSs and MMSs, audio and video call details all at one place. They also can share location and send animated GIFs.

Emoji Characters:  Initially users had to install third party app to use colorful characters in their SMS. Now, with KitKat, the keypad comes with native Japanese Emoji emotion icons.

NFC and Wireless Printing: Google's new OS comes with improved Quickoffice app where-in people can create and store word documents online as well as print files wirelessly on NFC-enabled HP printers.

Bluetooth MAP (Message Access Profile): This feature enables android devices in cars with Bluetooth support to exchange messages.

Multi-tasking:  With efficient memory management, users can multi-task by opening multiple applications. They can listen to music while browsing through the net.  

Performance: With low system requirements the new KitKat OS is expected to bring performance enhancements and also increase battery life.