IPhone settings Wi-Fi greyed out?

I noticed a few hours ago my phone wasn't connected to the Internet and was using 4G even while I was at home. I went to the pull up menu on my iPhone 4S and it said I had the Wi-Fi setting turned on but still nothing. So I went to the settings menu and no networks were listed. I reset my phone and then instead of no networks being listed, the entire option of turning on Wi-Fi was greyed out. The button won't move if I press it and whenever I try to turn on the Wi-Fi from the pull up menu, it says it's on but I'm still using 4G.

Back up the phone first.
Then, turn the phone off. With the phone off, hold the home button (only the home button) and plug it into iTunes. You'll see a data cable symbol on the screen of the phone, and the computer will tell you that it's recognized a phone on recovery mode. Proceed to restore the phone. One that's done, restore your previous backup and you should be good. If not, make an appointment at your local genius bar.

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