HTC One S is the smaller version of the HTC One X. It features a 4.3″ qHD Super AMOLED display with a resolution of 960×540. Powered by a Snapdragon 400 quad core processor clocked at 1.5GHz, it has 1 GB of RAM and internal memory of 16 GB. When it was released, it ran on Android 4.0.3 ICS.
HTC One S is more than 2 years old so it wont get official KitKat. It is still possible to install Android 4.4.4 KitKat on this device via the CyanogenMod ROMs. CM 11 latest nightly is available for this device with all the features of KitKat. Follow the instructions given below to install it on your device.