The Xperia Z was launched in March 2013. It has a 5″ screen with a high pixel density of 441 ppi. It is powered by a 1.5 GHz quad-core Qualcomm Snapdragon S4 Pro processor, Adreno 320 GPU. Xperia Z has 2 GB of RAM, 16 GB of internal storage, which is expandable up to 32GB. It comes with a 13.1MP primary camera. Xperia Z is also water and dust resistant.
Xperia Z hasnt received an official Android 4.4 update yet. However there are many custom ROMs available using which you can update the Xperia Z to Android 4.4. CM 11 is one such ROM which is very well known in the Android community for its features and performance. Follow the instructions given below to install it on Xperia Z.