Sony company is the best trusted company .and I parchased a phone sony xperia xz premium last week .xperia xz premium is first smartphone with a 4k HDR display .It phobr’s RAM 4GB and storage 64 GB. it’s phone pricessor Qualcomm snapdragon 835. And android os, v7.1 it’s phone primary camra 19 mp and 13 mp secondary camra and video quility is very good. 3.5 mm jack .fingerprint srnsor are avalable this phone and batery is Non removable Li-ion 3230 mAH bettery backup.but hanging problem in this phone