My iPhone 4S would not connect to wifi-- it did not recognize any networks. So I turned my phone off and back on again, and now wifi is off and it won't let me slide it to "ON". It won't interact at all. I tried a network reset and that did nothing. Is there a fix for this? This is is iOS6.0.1
If you Reset the Network in the iPhone Settings App, the next step is to Restore the iPhone Firmware with iTunes on computer. See if fixed. If still problem and there is Warranty or AppleCare make Genius reservation and take iPhone to Apple for resolution.