IPhone 4S Wi-Fi button greyed out after restarting phone?

My Wi-Fi button was greyed out all of a sudden and google told me to turn airplane mode on as well as the do not disturb button, turn it off and then back on again after a few minutes and then turn them both off. This worked but when I turned my phone off afterwards, it went grey again. Please tell me what's happening and a possible fix?

Do a back up in itunes then restore phone as new device to see if it works. If not it needs to be replaced.

  • Wi-Fi and Bluetooth greyed out after water damage on iPhone 5S? I dropped my iPhone 5S in water. I didn't have anything to dry it with, but a towel. I tried to turn it off, but it turned itself on again. Now my Wi-Fi is greyed out, and Bluetooth is constantly circling. I haven't backed it up for a long time. And I'm on vacation without any computer.
  • Why are my songs greyed out on my iPhone 4s? I have an iPhone 4s and I had it plugged into my computer I have songs I don't listen to so I deleted them all. I went on my phone and All THE SONGS were on my phone but greyed out! I tried to delete them but it didn't work! I don't know what to do and i'm not really liking iTunes anymore!
  • My iphone 4s has a greyed out no wi-fi? I own an updated iOS 5.1.1 iPhone 4s. Just yesterday it wouldn't connect to my friend's Wi-Fi. Now it won't connect to any Wi-Fi and just says "No Wi-Fi" and also won't let me click on it at all. I've tried resetting my network settings, resetting all of my settings, and even resetting with the home button and hold button.
  • IPhone 4S Wi-Fi greyed out So about a week ago I dropped my iPhone in water and it wouldn't work then I put it in rice over night and it was fine. The only thing is where you turn the Wi-Fi on its greyed out. I can't connect it to iTunes to update it as I don't have a computer what are some other ways I can fix this problem with my Wi-Fi as I don't really wanna pay $200 for an ensurance claim to get a new one.