A MacRumors forum threat reports that some iPhone 5 customers are having a problem with the iPhone 5’s Wi-Fi connectivity. Byran85 writes “I just got done setting up my iPhone 5 (as new, not restore). I was trying to download my music from iTunes when it seemed to be taking forever. I cancelled the downloads and then kept testing the WiFi in various other ways. Just loading the app store, my iPhone 4 will load anything faster than my iPhone 5 right now. I’ve rebooted the router and tried multiple devices and have narrowed the problem down to the WiFi in the iPhone 5. I’ve also tried using different bands, 2.4 and 5 both produce the same outcome. I launched speedtest.net app about 2 minutes ago and hit begin test. Its still “finding the closest server”. I have also tried the reset network settings. Still the same issue.” In that same threat other people report slow to no connectivity.

In the image above posted by @I_Am_Lucas is showing ~2.5Mbps (~300K/s) on his Wi-Fi network. Others have even reported speeds down to 0.5Mbps (~62K/s).

The interesting thing is that “some users have been able to isolate their problem to when connecting to WPA2 encrypted Wi-Fi routers, and found that moving to (the much less secure) WEP encryption or being unprotected can resolve the issue.“

Apple seems to be aware of the issue, but a resolution is not yet available. According to the AppleCare representative, they are still working on the issue.

Just spoke with iPhone AppleCare and they are definitely aware of the problem and Apple engineers are working on it. I asked if it was hardware or software related and she said the WPA2 issue seems to be software based and the non-connecting issue may be hardware based, but that they are still trying to identify the cause.

Source [macrumors]