Sony's back, and it returns with aplomb. The company has brought us an entire Xperia Z5 family of smartphones ranging from the Xperia Z5 Compact for small pockets to the 5.5-inch Xperia Z5 Premium with the industry's first 4K display in a production smartphone.
Source: http://www.gsmarena.com/sony_xperia_z5-review-1293.php