An unknown Sony Xperia is leaked online with a device name of s39h, the device looks like Xperia Z but instead of glass it uses plastic and it also looks like a unibody design from the pictures, the screen is said to be of 4.3 inch. I think it’s an affordable device which may not be available in the Global market only meant for a specific Country. Specs and Price of the device is unknown.
Source : Xperia Blog