Sony Xperia Z Ultra C6806 Google Play Edition 16GB (Factory GSM Unlocked) 4G LTE Android Smartphone - Black

The Japanese have not only made the thinnest 6.5mm watertight phone with the largest 6.44" screen and fastest 2.2 GHz quad-core Snapdragon 800 processor with the Xperia Z Ultra at launch, but it also wanted to diversify its phablet functionalities beyond what is possible with Samsung's Note family, for instance. As such, they have employed a technology that allows you to write on the screen with any regular pen or pencil whose tip is more than 1mm in diameter, besides gracing it with stylus input functionality.