Hi guys! I have Samsung Galaxy S6 DUOS. When the newest version of Android become available for Galaxy S6, I installed it. After that I notice that I have problem with home WiFi. When I connected on home network, my Internet is slower that I must be. I look on the forums and found out that the problem is with DNS. After I install DNS changer everything works perfect but I want to know how I can solve this problem that I don't need to have one app more and constantly remember that I must turn it on if I want great internet at home. 3G/4G and other WiFis works perfect without turning app on. Is there any chance that I solve this problem without rooting phone. I'm scared because I still have warranty on my phone. Please, help.