IPhone 3G won't connect to wifi, it's been connected before but now it won't work, the iTouch connects with no problem, it's just the phone. I've tried resetting it, updating it, and everything and still no luck.

I have a iPhone 3G that is running 3.1 and about 2 days ago, it was fine, connecting to wifi and everything. But now, it won't even find any networks? I've tried going to public places (I.E. McDonald's) and other places that have free wifi, and it can't detect the wifi, Why won't my phone find my home wifi now? I've tried resetting the network settings, I've reset the entire phone, i've done about everything all the other posts talked about. Anyone else got an idea?

I have, yes. I've been shutting it down by holding the sleep/wake key and the home button, aswell. Then I go in and reset network settings and I just get back to it not finding any wifi around. It has the little searching sign, but it just keeps going with nothing showing up.

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