I found that having IPv6 disabled on my router (which it was) prevented any of my iOS devices from working. As soon as I enabled IPv6, everything started working again.
If you have an older router, it may be not IPv6 enabled.
My 10 year old WRT54G v1.42.2 simply didn’t have IPv6 capabilities. I had to run to the store across the street and grab one with “IPv6 enabled” on the box.
After that my iPhone 5 miraculously connected to Wi – Fi
It seems that support guys at Apple have no idea, why customers cry about old bluetooth NOT WORKING any more with new iPhone 5. Customers have problems with blueteeth with HFP 1.5 and older versions. HFP 1.6 will work with iPhone 5.
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