My Iphone 4S has wifi disabled & button in menu is grey
I was using iOS 6.0.1 i guess and even tried upgrading to current 6.1 multiple times. Did the restore as new and old phone. Hard reset. But the wifi button is still grey. It was working fine and suddenly went off line.
Bluetooth and GPS are working and its even showing mac address.
Asif
iPhone 4, iOS 5.1.1