If you are one among those users who possess a HTC One on the AT&T network and aren’t new to the Android hacking tasks, here is a treat for you. An OTA build of Android 4.3 for the AT&T HTC One has been leaked as a zip file and can be flashed to your device easily.
A leaked RUU for the Android 4.3 for AT&T HTC One was available online. This has been packed and a flashable zip file has been created. You can download the zip file from the link at the bottom of this post and place it to your device’s memory. Boot into CWM or any other recovery you have on your device and flash the zip to get official Android 4.3 on your HTC One.
Be warned, though you can root the device after you have updated it to Android 4,3, you will not be able to get S-OFF on your device because this build comes with an updated HBoot. At the time of writing, there is no possible method to get S-OFF on AT&T HTC One’s Android 4.3 build.
The build.prop of this build can be see here. No information about what’s new in this build is available as of now.
If you don’t need an S-OFF, go ahead and hit the source link below to download the build.