Currently Being ModeratedJan 24, 2014 2:47 AM (in response to Lawrence Finch)
All I know is no one has came up with a solution to fix this problem, apart from this one that has worked on mine and solved the problem. had no option but to try this fix or pay £200 extra for a used replacement from Apple as they state it cannot be fixed.
Currently Being ModeratedJan 25, 2014 3:44 PM (in response to Highonlife)
OMG, it WORKED!!!!
Thank you Highonlife! We were JUST about to head to the apple store and fork out $$ for a phone that was JUST over a year old, but we tried the heat/cooling technique at the link you suggested
Gee. I would hate to be so cynical to think that this is a software scam. This should be brought to the attention of MacWorld.....next thing on my list....
Currently Being ModeratedFeb 24, 2014 2:39 PM (in response to Lawrence Finch)
After resetting everything, many hard shut offs and a hair dryer, I put my iPhone in the freezer! I was totally surprised that my wifi was already on and found my network! Thanks Lawrence Finch!
Currently Being ModeratedMar 5, 2014 2:58 PM (in response to Digital Cat II)
Same problem as listed.. I tried the blow dryer method, and I got the wifi back for about 5 minutes. The phone auto-shut down and upon reboot, the wifi was greyed out again.. I really believe it's a firmware issue, and although these quick fixes work, they are temporary. My problem began after the latest iOS s/w update 7.0.6.
Currently Being ModeratedMar 9, 2014 11:32 AM (in response to Digital Cat II)
Had the same problem (WiFi grayed out, no wi-fi available) all of a sudden today. I tried the network reset - no change. I was planning to try the Apple suggestion of resetiing iCloud and started by going to Settings - iCoud. I turned off everything in iCloud, including Find My Phone and when I went back to Settings, I saw that my wi-fi was trying to find a signal. It found my network and it's working again.
I have since turned Find My Phone back on and it all works.
iPhone 4S, out of warantee (of course); hope this helps someone.