Here is the perfect solution of Samsung J710F/ J7(6) touch not working after update 7.0 naught.
Download firmware 6.0.1 file.
Put your phone on download mode.
Connect phone with PC and press start.
Wait for complete flashing.
After complete mobile reboots and ask to input password on screen.
Power off your phone and hard reset by pressing volume up+home+power key at the same time.
Now reboot your phone and wait for complete power on.
Its done and touch working fine.
Then go to setting> About phone> and turn off download update automatically.