HTC has confirmed that their flagship device will get the taste of Android 4.3 Jelly Bean by the end of September. Currently, the device is stuck at Android 4.1.2 and only the Verizon variant of the device comes with Android 4.2.2 – not even the developer edition has the latest version. Today, HTC Ones Android 4.3 Jelly Bean pre-release version with Sense 5 has been leaked for the international HTC One. The firmware has been leaked on XDA-Developers and is available as a custom ROM. The leaker who goes by the name LlabTooFeR says he will release the original, untouched firmware on August 28 at 10 AM GMT.
The Maximus HD ROM is based on the pre-release version of the Android 4.3 Jelly bean update for HTC One. The ROM brings some improvements such as improved battery life and performance, OTA updates and much more. According to the folks at Android Central, there is a new Task Manager app in the app drawer, new Wifi HotSpot icon along with a shortcut to the Data Usage pane. It seems that the Launcher performance and animations have been improved as well.
The update is pre-release so we will definitely see some changes in the official release that is expected next month. HTC plans on releasing the Android 4.3 update for the US and Canada by the end of September. Until then, you can try the ROM at your own risk by visiting the XDA link below or wait for a month for HTC to officially release the update. If you ask me, I would suggest you wait for the official release until and unless you are too impatient to update your HTC One.