HTC is in the process or pushing out the much-anticipated over-the-air (OTA) update to all Unlocked and Developer Edition One handsets located in the United States. This upgrade brings the latest build of Android 4.4 KitKat and Sense 5.5 to the device, together with a multitude of additional bug fixes and speed optimizations, as well as a comprehensive redesigned multitasking system.

The One was released back in March 2013 and packs a 4.7-inch Super LCD3 capacitive touchscreen with a 1080 x 1920 resolution, a 1.7GHz quad-core Qualcomm Snapdragon 600 processor, an Adreno 320 GPU, 2GB of RAM, 32/64GB of internal storage, a 4-megapixel UltraPixel rear-facing camera and a 2,300 mAh battery.

HTC One Unlocked and Developer Edition owners – your Kit Kat roll out starts today! Let us know your favorite new additions. #KitKat #HTCOne

— HTC USA (@HTCUSA) November 29, 2013

According to Google, Android 4.4 brings a completely redesigned multitasking system which optimizes memory usage in every major component, thus “meaning users can run more of their favourite apps and switch between them faster than ever.”

In addition, the latest version of the open-source OS transports caller ID to a whole new level; when users receive a call from a telephone number that’s not in their contacts, their phone will search Google to look for matches from businesses with a local listing within Google Maps.

As this update has just started its rollout in the U.S., we assume that it will also be available in Europe pretty soon.

If you’re in the United States 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 until you receive a push notification informing you that an update is ready for your handset.

• SourceTwitter