Samsung J710f/ J7 next touch not working after update android 8.0.
This is a simple trick to solve this problem:-
Download touch fix file and Odin.
Open Odin and browse file on AP.
Click on start option wait for finish.
Mobile reboots and wait some minute.
If phone stock on logo then remove battery and hard reset your phone and reboot.
Then wait some minute it will work fine.