Answer to: WiFi Greyed out iOS 6.1.3This is a hardware-related issue. There are a number of ways to fix it. The most common steps are as follows: 1. Turn on Airplane Mode on your iPhone 2. Go to General > Reset > Reset Network Settings 3. Restart the iPhone There are also some additional exotic ways to deal with the issue described here: http://transfer-iphone-contacts.blogspot.com/2013/07/iphone-wifi-greyed-out.html Hope this helps.