With the Google announcement of Android 4.4 KitKat operating system last month, whereas LG Nexus 5 is the first smartphone getting Android 4.4 KitKat powered OS. Here Sony also putting some efforts on Android 4.4 update for its recently launched Xperia Z1 smartphone.
Sony started process to upgrade which usually takes many days for Sony. According to rumors, latest KitKat update will release in November 7th for the Xperia Z1. With the update for Xperia Z1, there will be chance to get Android 4.4 update for Xperia Z Ultra.
If we take a look at last few months or years, never ever happened, none of mobile maker company had an update for any non-Nexus device, it was not released any updates to latest OS till now except Nexus devices. So, there is no hope of release an update to Android 4.4 KitKat.
Till then think about it. Nothing is impossible. We'll get back with more update. Follow us and stay connected.