Please may I ask a followup qquestion - after the freezer trick got wifi button back, did it stay working?
Or did it revert back into greyed out state again?
This issue is so confusing!
Lost all Wi-Fi connectivity after istalling ios 7.
Wi-Fi not grayed out.
I reset the phone twice, reset wifi network settings multiple times. Apple support told me they would repair it for $199.00. After 10 days traying everything I decided to do what some people were saying. Turned wifi off, turned the phone off and put it in the freezer for 10 minutes, turned the phone back on and then the wifi came back 100%, it has been 5 days an it is still working like new. I know it does not make sense, I tried it because I had tried everything else. I called apple support to let them know, left a message with my case number, they have not call me back.
My joy was too quick, although it lasted a couple of hours. WiFi is dead again! Now I'm sure that EVERY trick you can find on this thread and the web is just not working for my 4S (well, I still haven't tried the fridge).
**** you, Apple!!!
When the wifi died this time, what app were you running just before it died?
I have read on ifixit.com that some apps not fully compatible with iOS7 can cause wifi to become locked up and disabled. And that after they deleted the app, a hard reset, then wifi became useable again. True, it could have nothing to do with the app, and that the wifi came back due to the hard reset.
I did use the freezer method which solved the wifi greyed out issue. Unfortunately the wifi still doesn't find the networks... I suspect the issues are related.
Pls try a power cycle on the router - unplug power source, wait a some brief time, then plug power back in.
General troubleshooting steps:
1.) Router set to 802.11n only, 20MHz only, WMM enabled, security disabled.
2.) Use PC's wifi to scan your environment. Do you see any wifi routers that have strong signals? Do you see any wifi routers that have similar names as yours?
3.) Does your router have a fancy SSID? Try a simpler name. Instead of "Tony's Router", change it to "TonyRouter". An inocent space can be a source for problem.
4.) Set your iphone's name to something simple and short. Instead of "Yvette's iPhone4S", set it to YvetteIphone4S". Removing the apostrophe actually fixd the wifi grayout problem for some people.
5.) Site closer to the wifi router. Wifi routers can die too. I've had trusty old routers that seem to work fine everyday then start to act up. Some days ok, some days can't keep a connection.
The fact that your 4S came back to life after you erased, without restoring, all apps may well be the proof that iOS 7 is in conflict with one of those apps (and that this is NOT a hardware issue). Probably this result could have been achieved with less trouble if you had tried erasing the apps one by one - but then, this is what Apple techs should have been doing all along, trying to pinpoint the source of the wifi disease instead of sitting on their backsides in their Genius Bars and trying to stonewall this issue. Incidentally, if the original assumption (iOS-app conflict) is correct, the problem may come back when you download the guilty app back onto your phone.
I wonder, (1) if there is a way to find out how many users are affected by the wifi disease, do a headcount, so to speak (Apple should have that information based on the number of complaints and replacement requests, or they have grown more incompetent than I suspected); (2) where Apple protectors have disappeared (as I am sure they are not busy installing the OS they are protecting); (3) whether Apple is going to acknowledge their error, and at least announce they are working on some remedy - or permit those affected to roll back to iOS 6.
If and when the truth comes out and the **** hits the fan, Apple's failure to warn people who may be potentially exposed to the wifi disease to refrain from upgrading to iOS 7 may well enrage some people into suing Apple for damages - and will definitely encourage many people to get rid of Apple products and defect to its competitors. Either way, Apple's ostrich policy ("hide your head in the sand - and hope the problem will somehow go away") is going to cost it...
You seem to be under the impression that Apple is somehow responsible for the interaction of every app that is put out in the App Store with your device (in combination with every other app you may have loaded on it). Apple is not directly responsible for those apps, nor do they have any control over whether or not the developers have made them compatible with iOS 7 or not.
Also, they have no control over people downloading non-App store apps onto their devices.
So, if this issue is being caused by a conflict between an app and iOS 7, or by a combination of apps with iOS, it is not something that Apple could have forseen, tested, prevented, warned you about, or anything else.
How would you expect that to have occured, exactly?