The HTC One X is a touchscreen-based, slate-sized smartphone designed and manufactured by HTC. It was released running Android 4.0.3, (upgradeable to 4.2.2) with the HTC Sense 4.0 skin. It was the first HTC phone to be equipped with a quad-core processor. The One X was announced on February 26, 2012 at the Mobile World Congress, and considered as a flagship product of HTC One series from the time of its release through April 2013.
The One X shipped with the Android 4.0.4 mobile operating system with the HTC Sense 4.0 graphical user interface. The upgrade to Android 4.2.2 with Sense 5 is available for most regions like Asia, Europe, Middle East, the Americas, and Australia. 25 GB of Dropbox storage is offered free for two years. Some users have noticed that multitasking does not work on the HTC One X as it does in stock Android 4.0 Ice Cream Sandwich since the system more aggressively terminates apps in the background. HTC has explained that they customized Android on the One X so that HTC Sense has priority over background apps when memory is low.
On July 20, 2012, HTC confirmed that the One X, along with the One S, would be receiving a firmware update to Android 4.1 Jelly Bean, however did not announce a release schedule for these improvements. mid-November and early December, the Android 4.1.1 update began rolling out worldwide, bringing many new features and improvements such as the Google Now implementation, Project Butter giving it an overall smoother UI and battery optimizations which help improve battery life and to quell overheating. On June 20, 2013, a functional Ubuntu Touch build was made available for download.
The HTC One X, The 2013 HTC One plus also The HTC Butterfly and the refreshed version of the HTC One X, called the One X+ was promised an update by HTC to the latest version Android 4.2.2 and the new Sense version 5 in the near future and just a few days later on the 19th of August, the update officially began rolling out to the One X, bringing it up to date with the newest sense version, Sense 5 UI, Android version 4.2.2, Quick Toggles and many software improvements found in the 2013 HTC One.