Samsung has officially started rolling out the much-anticipated Android 4.4.2 update to all its Galaxy S4 and S4 LTE-Advanced (LTE-A) variants currently located in Korea. In addition to the hefty bump up from Jelly Bean to KitKat, however, this particular upgrade brings a newer version of the TouchWiz user interface, as well as a multitude of bug fixes, speed optimizations and stability improvements.

The S4 packs a 5-inch super AMOLED capacitive touchscreen with a resolution of 1080 x 1920 pixels, a Exynos 5 Octa 5410 chipset powered by four 1.6GHz Cortex-A15 central processing units, 2GB of RAM, 16GB of internal storage (expandable up to 64GB via microSD), a 13-megapixel rear-facing camera with optical image stabilisation and a 2,600 mAh Li-Ion removable battery.

The full changelog for this rather hefty Android 4.4.2 KitKat update, which weighs in at roughly 300MB, can be seen below:

• Android 4.4, KitKat: Android 4.4.2, KitKat, is the latest release of the Android platform. KitKat includes enhancements such as restyled status and navigation bars, a new full-screen mode, color emoji support, improved closed captioning support, stronger security, smarter power use, and more tools and capabilities for better app development.

• TouchWiz UI improvements and optimizations.

• Phone dialer: Improved the phone app with the ability to look up contacts directly from the dial pad, see and tap frequent contacts, and search your corporate directory easily.

• Camera – Focus and exposure: Enhanced the “touch to focus” option with a new circular, on screen control that can be dragged by your finger around the viewfinder to adjust a photo’s focus and exposure.

• Gallery – Photo editing: Added new photo editing options to the Gallery app including new filter effects, draw on your photos, advanced cropping, and adjustments to color, exposure, contrast and more.

• Printing documents and pictures: Added support for printing photos, Google Docs, GMail messages, and other content via Wi-Fi, Bluetooth and hosted services like Google Cloud Print and HP ePrinters.

• Hangouts – SMS/MMS support: Incorporated a new version of Google Hangouts that supports integrated SMS/MMS messaging. Hangouts can be set as the default SMS app under Settings > Wireless > Default SMS app.

• Accessory: support Added support for Square credit card reader.

If you own a Galaxy S4 and have not yet received the OTA update, you can head into “Settings,” then “About Device,” and select “Check for Updates” to manually scan for the upgrade. Alternatively, you can wait for the push notification to arrive on your handset prompting you to download and install the software update.

• SourceTwitter