According to Macrumors, some iPhone 5 users are reporting Wi-Fi related issues in their and Apple forums.
Based on this discussion thread on Apple’s support forum, users are complaining of Wi-Fi slowness, drop in connections or no connectivity at all.
bryan85 - a MacRumors forum member complains:
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.
He has updated the post to say that he hasn’t noticed the issue on his replacement iPhone 5, but some users are facing the issue even with the replacement unit. Users are reporting speeds down to 0.5Mbps on their Wi-Fi network.
MacRumors reports that some users have temporarily solved the problem by moving from WPA2 encryption to less secure WEP encryption or disabling encryption.
MacRumors also reports that according to one of their forum members, Apple seems to be aware of the issue but there is no solution available currently.
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.
Are you facing a Wi-Fi related problem with your iPhone 5? You can also check out these tips to see if it resolves the Wi-Fi connectivity issue.