According to a recent report by SlashLeaks, Sony has an upcoming smartphone code named H8541 to launch in 2018. The leaked H8541 Android smartphone comes with 5.7 inches 4K HDR with TRILUMINOS display, X-Reality display technology and enforced by 5th generation Corning Gorilla Glass on the front and the back.
The Sony H8541 is sized at 149 x 74 x 7.5mm which is even smaller than the 5.5 inches Xperia XZ Premium. It is rumored to runs on Android Oreo and powered by Qualcomm Snapdragon 835, a 3420mAh battery and IP65/68 water and dust resistant certified.
However, those information has yet to be verified officially by Sony Mobile.