According to Apple’s support forums in the last few weeks problems about OS4 upgrading, the iPhone will no longer pick up the presence of Wi-Fi networks at all. Reverting to the old iPhone operating system does not resolve the problem, nor does resetting the phone to factory-original status. Forum posters posit that the upgrade in some way has “fried” the Wi-Fi chip in the phone, leaving it unfixable via software. i havent update my iphone jet but i just wanted to know if this can be true???, i readed some post here about the ios4 update process and result posted by users however nothing about this issue..