One of the best smartphone on the earth I mean it looks cool it performs coool and its look better in 4k screen with 3 GB of RAM, many of the mobile lovers used to buy Sony because it has nice sound effect and good condition camera and the design was awesome and know coming to the speed of ram it has enough RAM of 3 GB there is no doubt to go for a review to my own Sony Xperia z5 I think everyone wish to buy smartphone like Xperia z5