Sony used to be a strong supporter of Windows Mobile and churned out several devices running that platform. But when the platform eventually died and MS released Windows Phone, no phones were announced from Sony.
Today Evleaks is reporting that Sony is working on a new handset called Lue Z and by the picture leaked, it is safe to assume that it runs Windows Phone 8.1 operating system.
No specifications are available at the moment but it is great to see WP platform being adapted by more and more OEMs.