Google has officially taken the curtain down from what is the next big mobile OS for the company. Android 4.1 Jelly Bean brings to Android what ICS missed out on. The biggest change according to Google is something they like to call “project butter” which now allows the the whole interface to run at 60fps. While the difference in speed is a few milliseconds, you will notice the difference when a Jelly Bean device is placed next to a ICS device.
The home screen has been tweaked, adding features like dynamically resizing widgets,that resize and move unwanted apps and icons out of the way. The camera app, which was already a highlight of ICS, has gotten even better in 4.1. Now, the gallery is slickly integrated, allowing you to quickly pull up the photo you just took with a swipe to the left. Something like what you would see in the Windows Phone Camera app.
Deleting images is as simple as swiping a pic off the screen. The unique undo button allows you to recover a photo you might have accidentally deleted. Google Android Jelly Bean 4.1 brings something that most smartphone users have asked for in the past year, voice to text without data. The language model in Jelly Bean adapts over time, and the keyboard even guesses what the next word will be before you’ve started typing it. With improved text-to-speech capabilities, voice typing on Android is even better; it works even when you don’t have a data connection, so you can type with your voice everywhere you go.
Jelly Bean also bring advanced Accessibility to the mix, With Jelly Bean, blind users can use ‘Gesture Mode’ to reliably navigate the UI using touch and swipe gestures in combination with speech output. Jelly Bean also adds support for accessibility plugins to enable external Braille input and output devices via USB and Bluetooth.
Taking note from the Galaxy S3 the new Jelly Bean OS for Android brings Android Beam to every smartphone running it, with just a simple tap, in addition to sharing contacts, web pages, 
YouTube videos, directions, and apps. Just touch two NFC-enabled Android devices back-to-back, then tap to beam whatever’s on the screen to your friend. Instantly pair your Android phone or tablet to Bluetooth devices like headsets or speakers that support the Simple Secure Pairing standard by just tapping them together – no more syncing or searching required.
Android 4.1 Jelly Bean also Improves Google Search on the phone OS, it has a new look-and-feel, and has faster and more natural Voice Search.Predictive input lets you select your search criteria, before you even ask. The new Knowledge Graph is used to show you search results in a richer way. It’s easier to quickly get answers and explore and browse search results.
With JB 4.1 and the new “Google Now” tells you today’s weather before you start your day, how much traffic to expect before you leave for work, when the next train will arrive as you’re standing on the platform, or your favorite team’s score while they’re playing. The Knowledge database build around your likes and wants and build your phone to become more and more personal over time.
