the Sony Xperia Z4 is the successor to the Sony Xperia Z3 and remains the flagship device for the Japanese phone giant. Look-wise, there hasn’t been a great deal of change throughout the Xperia Z flagship series and most people are upgrading due to expiring contacts or to just have the newer version.
Sony always do a great job with the camera and multimedia and the Xperia Z4 is no exception. The Z4 is a notable upgrade over the Z3 smartphone from last year, now being powered by a Snapdragon 810 system chip. You also get over 3 GB of RAM running your system internals, as well a battery that gives you over 90 hours of music listening time.