I have had my S4 for a couple of months now. Up until last night I have had no issues. I have Wi-Fi at home and always connect automatically. Last night, my Wi-Fi on my phone was not working at all. I rebooted it a couple of times with no luck. The Wi-Fi button is a dim green color compared to the rest of the icons being a bright green. When I go into Wi-Fi setting it shows my Wi-Fi is off and when I swipe it to on it reads Turning on Wi-Fi, but nothing happens. I keep my Wi-Fi always on even if I do not have a Wi-Fi signal and the light is normally bright green. Can someone please help know what to do to turn my Wi-Fi back on. I have never had this problem before and it is very frustrating because my phone carrier does not have signal at my house so to use my phone, I have to be connected to Wi-Fi, not to mention I love my Wi-Fi for everything else on my phone as well.