wi-fi on 4s greyed out after updating to IOS 6
I'm using an iPhone 4S 64GB (white). I just updated it to IOS 6 and at first it seems ok until I found out that the wi-fi is greyed out and there's no way for me to turn it on. I tried everything and even restored from backup and even doing a hard reset.... Please provide solution.
iPhone 4S, iOS 6