TS1398 Updated iphone 4s to ios 7.1.1 - Wifi Greyed Out

Updated my iphone 4s to IOS 7.1.1 , 4-29-2014, and every since the update to 7.1.1. my WIFI has been greyed out no matter where I am. I have done all the resets, but resetting to like new, still no WIFI. This seems to be a on going problem with lots of others. There are all sorts of ways to attempt to fix. Today, a co-worker was not able to receive calls after he updated to 7.1.1 and he took to cell provider and he downloaded a patch, which took all of 2 minutes and he is now able to receive calls. I called Apple support to see if they could help and they said it was a hardware problem and they could sell me a iphone for $199.00. I believe there should be a patch or something else to do with the Software issue, besides a blow dryer and freezer method,
Can anyone Help with a solution or advise what the issue is with the 7.1.1 update????

I - like so many - am having the same problems. And they are actually getting worst with the phone starting to freeze. Problems started after 7.1.1 was installed. I have tried all recommendations and nothing works. The only procedure that worked temporarily was putting the phone in the freezer (sounds crazy) but it did work. Why Apple does not want to take responsibility and fix the problem is disappointing.

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IPhone 4S/iOS 7.0.4/WiFi Grey Out Issues

My iPhone 4S (64GB memory/ATT) was working beautifully on iOS 5.1.1. WiFi connected seamlessly with Access Points at home, work, etc.
Then I made the mistake of wirelessly updating to iOS 7.0.4. Instantly the WiFi stopped working and the <Settings>, <WiFi> tab was greyed out and non-responsive. Oddly the WiFi tab on the Control Panel was responsive, but did not actually activiate the WiFi chip or open a connection to the WiFi antenna. Accordingly, there is no option to find or connect to a WiFi network.
Most other features appear to work, including the ATT cellular service and Bluetooth connection. However, the iPhone is slow to respond to some apps, For example, tapping <Settings> takes 5-6 seconds for a response whereas with iOS 5.1.1 the response was instantaneous. Also a few apps (even after updating) and a couple of iOS pages now cause the iPhone to go blank for a few seconds or crash.
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-Backing up, Restoring iOS and firmware, and Restoring applications and data using iTunes.
-Restoring iOS and firmware using iTunes, and then setting up as a new iPhone.
-Turning off iPhone, waiting while ATT pushed a new switch data pack to iPhone, and then restarting iPhone.
Actually I did all of these "fixes" at least twice with the same result: still a greyed out and non-responsive <Settings> <WiFi> tab with no WiFi signal.
Apple and ATT's ultimate solution was predictable: Buy a new 64 GB iPhone 5 for several hundred dollars (plus numerous proprietary cables) and forget the 47 GB of data, photos, etc. lost beta-testing their iOS and "fixes".
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ChrisJ4203, thanks very much for your input. I don't mean to turn this post into an endless debate, but frankly I am still having a hard time believing that the WiFi died as a result of a hardware failure.
My logic might be flawed, but here it is:
While the iPhone 4S got very hot when wirelessly downloading and installing iOS 7.0.4 over the WiFi network, the WiFi chip and antenna had to be functional to complete the wireless iOS update. Apple was very clear that iOS 7.0.4 is too large to download and install via cellular service. Accordingly it would appear that any hardware failure had to occur in the few minutes between the download/installation of iOS 7.0.4 and its first use. That window of opportunity is incredibly small in an otherwise flawless hardware performance. I am not a big believer in long shot coincidences, so a WiFi hardware malfunction seems highly improbable to me, but not impossible. A firmware/iOS conflict still seems more plausible to me.
I also don't read much into Apple's "out-of-warranty" replacement offer at $199. AT&T tells me that anyone walking in off the street (with or without a hardware or iOS malfunction) would receive the same offer.
I appreciate that some iPhone 4S users did not experience any WiFi issues when they updated to iOS 7.0.4, but such difference could easily be explained if Apple used more than one WiFi chip and/or firmware in the iPhone 4S series. Such an explanation would also account for iOS 7.0.4 (and 7.0.6) not recognizing the WiFi chip after the iOS update.
Still perplexed, but thanks again for your kind efforts to help.
Wonder if I can limp along long enough to spend my money on an Apple iPhone 6 ... but then again I don't want to be anyone's beta-tester.
I am tempted to switch to a Samsung Galaxy or some other smartphone as long as I will be buying new accessories, but frankly I don't want to waste my time learning a new OS or core apps.

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Spoke to a "senior advisor" in the Apple TV department. Her suggestions: change channel in router to minimize/eliminate wifi interference from other users; move router away from any metal - i.e., DVD player, phone modem, etc.; keep router away from wireless 2.4 gH phones, which are "notorious" for crashing wifi routers. So she confirms that the problem is one of connection to router suddenly dropping out.
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TS1398 Updated iphone 4s to ios 7.1.1 - Wifi Greyed Out

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