If you are on trip, you may to switch on airplane mode to avoid any roaming charge. But sometimes, when I was in a cafe with free Wifi, I turned the Wifi on again. Everything works really fine until I was back home. When I tried to connect my iPhone to my home wireless network, it didn’t work. As I checked out the Wifi option in “Settings” screen, the Wifi option is just grayed out or disable by iPhone itself. Even I rebooted the iPhone, the wifi option still stayed in disable state.
This is not the first time I heard from my readers or other jailbreak iPhone users about this Wifi problem. But, I’m also have same experienced it on my iPhone. And here is the fix:
Reset The Network Setting
Just resetting iPhone’s network setting, the Wifi option comes back to normal. To reset the network settings, go to “Settings” -> General -> Reset -> Reset Network Settings.
I’m not quite sure if this is the universal solution to the Wifi Grayed-out issue. But this one works for my case



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