Two of the most popular Korean operators, SKT and LG U+, are in the midst of pushing out an unexpected over-the-air (OTA) update to all Optimus G Pro handsets located in South Korea. In terms of functionality, the upgrade brings Android 4.4.2 KitKat and Sense 5.5 to the device, complete with the usual plethora of bug fixes, speed optimizations and stability improvements that we’ve grown to expect from any major software update.

Android 4.4.2 is an incredibly major upgrade from 4.3, packing a completely redesigned user interface, SMS message integration in the standard Hangouts application, Google Now on the home screen, Wi-Fi printing capabilities for HP ePrinters and Google Print customers, autocomplete for the traditional telephone dialer, Emoji integration for Google Keyboard, built-in word processing software and lots more — to view the full list of improvements click here.

The full changelog for the rather hefty 300MB update can be seen below:

• Android 4.4.2 OS upgrade.
• Improved system performance.
• Increased transfer speeds via MTP.
• Hangouts has been named as the new default messaging application.
• Transparent notification bar.
• Improved RAM management.

For those of you who need a refresher on the handset’s profile, the Optimus G Pro was released back in February, 2013, and packs a beastly 5.5-inch Full HD IPS+ LCD capacitive touchscreen with a resolution of 1080 x 1920 pixels, a Qualcomm APQ8064T Snapdragon 600 chipset, 2GB of RAM, an Adreno 320 GPU, a 13-megapixel rear-facing shooter with OIS and, finally, a 3,140 mAh Li-Ion battery.

If you’re in South Korea and own either a SKT or LG U+ branded Optimus G Pro and haven’t yet received the OTA update, you can head into “Settings,” then “About Device,” and select “Check for Updates” to manually scan for the upgrade.

• SourceKBench