Z5 premium is sony’s flagship phone from z series. The major boom in the phone is its 4k display that makes it premium from the normal z5 but that is not of much use because its pixel density is much more than reception capacity of normal human being. There is not much change in its design except the lock button is replaced by fingerprint sensor which makes it a bit cheesy.
Talking about its primary camera, it has 23 mp camera which is claimed to have fastest autofocus in class of smartphones. Its secondary camera has 5 mp camera which gives satisfactory image quality. Its 3 gb ram makes its performance quite smooth. Overall phone is worth money