Samsung j7 prime when I bought mob then they worked superior when I updated my mobile then we faced lot of problem like clearity of camera get very poor also we faced charging problem before update mob charged fastly after updation mob charging became slow and reduced faster also I faced hanging problem.mob hanged every time when we open fb wtsapp other social media app also storage fill high. the hanging problem largly aquired.also in samsung j 7 prime TFT disply is provide got poor picture quality otherwise look of phone is attractive.