Been having a strange issue with my iPhone 5. I recently had it replaced by Apple for a different hardware issue but this previous issue remains. Basically a page in Safari at times will not load while connected to wi-fi. It just hangs but the wi-fi icon remains. Disabling wi-fi and then enabling it again remedies this issue, but that isn't a proper solution. This probably happens two or three times a day. My router is a 5th generation AirPort Extreme.