Sony recently showed off Android 5.0 Lollipop AOSP (Android Open Source Project) on a number of Xperia Z flagship devices including the Xperia Z3. Today, Sony has made the Android 5.0 Lollipop AOSP source code, pre-built software binaries and build instructions available for a number of handsets which includes the Xperia Z3, Xperia Z3 Compact, Xperia Z2, Xperia Z1 and Xperia Z1 Compact.
This gives developers a chance to develop custom ROMs based on Android Lollipop AOSP for these devices. Don’t expect this software to replace your daily driver, for example the camera and modem is not working. If you want to find out more, including instructions and download links, head over to Sony Developer World.