Wifi gray out

My 4s has had no WIFI issues until i updated to iOS 7.0.4. after the update it worked for about 20 hours then disabled. I noticed my wifi was no longer connected, i checked the wifi was on and it was, still unable to connect i restarted the phone and now the WI-FI button is grey, dim and wont switch on. However Bluetooth does work fine.
Pls help.

Hi,
I recently had the same issue. After speaking to a tech expert from Apple, it was confirmed that the issue was due to a hardware problem. I got my iPhone replaced by Apple just 3 weeks back. You may want to try that...

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    If you take a look at the forum you will see that there are many threads related to this and other wi-fi issues related to ios 6.  There are many recommendations of things to do but it seems like none of them consistently fix the problem, or else they fix them temporarily and then the problem comes back.
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