touch problem

Thank you for being with Samsung and sharing your concern. We would request you to avoid using any third party cover and case with the device. If the issue persists, we would like to offer some troubleshooting steps to overcome the issue:
1) Navigate to Settings >> Display >> Enable Block Accidental Touches.
2) Navigate to Settings >> Apps >> Tap on More >> Reset App Preferences.
3) Reset the device settings by navigating to Settings >> General Management >> Reset >> Reset Settings.
Be sure to hit ♡ when you find an answer that works for you.
For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/