[iphone 3G] wifi button grey and reinitialisation do nothing

just woke up and saw i didn't receive wifi so i went in the setting to see if ive disabled it but the wifi button is grey ive looked on our best friend ( google) and it just say to restart it and if still don't work a reinitialisation will fix it, but nothing happen ive an iphone without wifi now?

I would first reset network setting...if that doesn't work...I would back up my iphone then restore it using itunes...if is still not working after the restore you may have a hardware issue http://support.apple.com/kb/HT1414

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