HT2188 I have 4s iphone . I got message on phone iOS 6 is available , please up grade it . I did it and now now Wi -Fi is available. I lost Wi-"Fi  . even it does not activate and in General  its Serial No. is  N/A .  Please tell me what to do

Hello Friends ,
I have  iphone 4s . One day I got message iOS6 is available , do u want to update it . I press YES  .  as soon as my software was up dated.  My Wi-Fi  was disappeared .  In Settings Wi-Fi  does not activate . Please suggest me what to do?  Even in General , Wi-Fi does not have address  there is writtern  N/A

Had similar problem. I unpluged my Wi-Fi roughter for maybe 10 seconds and turned it back on, checked my 4s and Wi-Fi was working.

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