Sony xperia z3 is a upgrade version of z series from Sony in this phone screen is 5.2 inches IPS display 16m colors and processor Qualcomm snapdragon 801, rear camera MP20.7 MP, 5248? 3936 pixels, autofocus, LED flash, 2.2 front and 3gb of RAM, 32/16gb ROM and OS is 4.4 Android upgradeable to 5.1 lollipop