You will automatically get a notification on your smartphone as soon as the update is ready, you can also check for the update manually by going to Settings << About Phone << System updates.
if you don’t want to wait for the OTA, You can directly download the update using this LINK and transfer it to the phone storage. Then, you can go to the phone’s stock recovery and flash using the “update from phone storage” option.
You can also use this guide to update your HTC One Google Play Edition using ADB Sideload.
The update brings the usual KitKat features including UI improvements, faster multi-tasking, and cloud-print support. Check out more about KitKat features here.
