Currently Being ModeratedMay 13, 2013 2:28 PM (in response to Certainty)
Restore iPhone with iTunes on computer. If still problem, then the WiFi Chip is faulty. If there is Warranty or AppleCare make Genius reservation or set up service and take or send to Apple for resolution.
Currently Being ModeratedMay 13, 2013 5:21 PM (in response to Certainty)
See this page: http://support.apple.com/kb/TS1559
Currently Being ModeratedMay 30, 2013 11:30 PM (in response to Certainty)
hi! i had the same problem that started just today and im glad i can sleep sound.. my wifi grayed out too.. i did these steps and it worked..
>go to settings and turn your airplane mode on as well as your do not disturb mode..
>turn your phone off.. wait for 3-5 minutes.. then turn it back on..
>then turn your do not disturb mode and airplane mode off..
>after doing these steps, i hope your phone's wifi is already working just like mine.. goodluck! i hope it helps!