The One X is HTC’s flagship phone for the first half of 2012. It features a LCD2 720p screen, a quad-core Nvidia Tegra 3 CPU processor that is backed by a full gigabyte of RAM and 32 gigs of flash memory. The device’s software is also notable. The One X comes pre-loaded with Android 4.0.3, featuring the HTC Sense 4 user interface.
This device being more than 2 years old, HTC will not provide the official KitKat support. This is where the custom ROMs are of great use. CyanogenMod team have developed the CM 11 custom ROM running on Android 4.4.4 for this device. Although you will lose the beautiful Sense UI, it will greatly improve the performance of the phone. Follow the instructions given below to install CM 11 on HTC One X.