Hi guys.. since yesterday my s4 will not connect to the internet by wifi.. it will say connected to eg. My sky or my partners virgin. show the wifi symbol but wen i try to go on the internet and even fb it says no router detected.. i have tried 4 different wifi locations. Home work my partners etc that iv always connected to to.. why would my phone suddenly stop allowing me to connect even though it tells my im connected to the router but cannot detect router network