I have intermittent WIFI connection problems as the DNS-lookup fails. Not always however - about half the time. I seen that other Samsung users also have the same problem. I am pretty sure it´s not the router as I have a Windows lumia 640 connected and it never has had problems. I did a factory reset a couple of days ago but that didn´t help either. It´s stil soemtimes yes, sometimes no. Can anyone help me with a solution? Thanks in advance