wpa_supplicant.conf permission

So I'm facing this problem for a while now . What happens is that my phone reboots automatically sometimes and after the reboot I can't use my WiFi . The button is stuck at off: So after doing some research on this I wiped my /data/misc/WiFi folder to fix it (didn't create a backup though). So the problem got fixed but it came back again. So I wiped again and it didn't work this time. In order to restore the folder I copied the WPA_supplicant files in the folder manually. But I don't know what permission to set it to . And even if I change the permissions it gets reverted back to 0660. Also I don't know whether the the .conf file is even compatible for my phone as I got that one from an XDA post. Can anybody guide me how I can fix this ?