Last month, Samsung USA had released a list of devices eligible for KitKat update, but refrained from disclosing any specific timeline of when the process would begin, but now a company document has been leaked disclosing the schedule of the roll out plan.

Technology blog, JustAboutPhones, has got hold of the Samsung's Internal document revealing that the 2012 flagship models- Galaxy S3 (GT-I9500) and Note 2 (SM-N7100) as well as newly launched mid-range smartphone Galaxy Grand 2 (SM-G7102) are slated to receive chocolate-wafer flavored Android OS update around April and May. [To view the leaked document, click here]

However on close observation, Galaxy Note 2's model number seen in leaked document is wrongly printed as 'SM-N7100', instead of GT-N7100 thereby casting a shadow over the authenticity of the report. But, the website's insider later clarified the mistake in the print was the reason, why the document got discarded and hence obtained.

As of now, there is no way to prove the legitimacy of the leaked document, as the reports says the KitKat update is scheduled to roll-out next month. Therefore, we just have to wait few more weeks to see if the report turns out be true. Until then, it will remain as pure speculation.

As per Samsung's official press release, Galaxy S4 Mini, S4 Active, S4 Zoom, Galaxy S3, S3 Mini, Galaxy Mega, Galaxy Light and tablets such as Galaxy Note 8.0, Galaxy Note 10.1 (2014 Edition), Note 10.1 and the Galaxy Tab 3 are certain to get the KitKat update this year. [Galaxy Note 3 and S4 have already received the new firmware]

Key Features of Android v4.4 KitKat OS Update:

Location Menu:  This integrated location menu enables users to easily activate GPS, Wi-Fi and mobile networks, while simultaneously keeping a tab on the battery consumption by the location service based apps.

Enhanced Google Mobile Service (GMS) apps: This application helps user to automatically back-up photos and video clips. He/she also can create, view, share rename Google Docs and files.

Improved Caller-ID: If a user 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 prioritize contact list for easy access, based on the frequency of the peoples' contacts to which users talk.

Immersive Display: To enhance the 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: Google has brought in some improvements to the new Hangouts app; now, users can find all their text SMSs and MMSs, audio and video call details all at one place. He/she can also 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 update, the keypad comes pre-loaded with native Japanese Emoji emotion icons.

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

Multi-tasking:  with efficient memory management, users can multi-task by opening multiple applications; Listen to music while you can browse through the net.  

Performance: Like all software updates, the new KitKat enhances smartphone's performance as well as efficient RAM management, leading to increase in battery.

(Edited by Anu James)