I purchased Samsung j7 on 15/12/15.bt within a very short time of 5 months its display shows some problem it completely gets blurred when brightness reduced and nothing is visible th3n as it was a in warranty period so I sent it to service centre the told me that they could not rectify it as such type of problems is already pending in their service centre for a long time. they told me to wait again for 15 to 20 days .very very disappointed with Samsung service.