You can now find instructions on how to use device configurations from Sony to build AOSP KitKat and flash it on an unlocked Xperia device, in a new guide we’ve created. This guide includes a step-by-step instruction that takes you from preparations of your environment, to what tools you should download and install, and then how to configure the code. At last, we’ll explain how to build an AOSP image and flash it to your device. Please note that you should be familiar with Android development to use the instructions, and that the software created is not intended for daily usage and there are important limitations. Head over to the How to build AOSP KitKat and flash it on an unlocked Xperia device guide to get started!