Problem: Since upgrading to IOS 6 my iPhone would connect to an access point and even obtain an IP address but I wouldnâ€™t have any access to the internet. Same thing happened with my iPhone 5. The downloading of apps failed during my restore from iCloud.
Solution: I have tried many things and two seemed to work for me but itâ€™s not a consistent/guaranteed fix.
1. Went into Settings and deleted the History, Cache and Cookies in Safari. Turned off the iPhone and then back on. Working perfect. So far so good.
2. I noticed that the type of encryption might be an issue as well. At work, Iâ€™m using TKIP but at home Iâ€™m using WPA-Personal. At home my WiFi and iPhone work just fine together. Iâ€™ve read where others have had luck switching to WEP. This kind of reminds me of the Windows 7 wireless issue I had.
3. Some have even tried manually putting in Googleâ€™s DNS server in their network settings. Or setting the proxy to auto. Didnâ€™t work for me but worth noting and hopefully it works for you. 220.127.116.11 and 18.104.22.168 are Googleâ€™s DNS servers..
Any other ideas? Let me know..
Update 10.1.12: If you are using Verizon, apparently Apple has come out with a fix that might help your problem. More infoâ€¦
Update 10.3.12: I had an iPad 2 that I couldnâ€™t get working. Even tried changing the authentication to different types and still nothing. Turns out that solution 1 above was the fix but it is imperative you reboot your device. It wouldnâ€™t work until I rebooted.
Update 10.22.12: Still having to reset cache and cookies but the good news is that Apple is going to be releasing a new version, IOS 6.0.1 that might address these WIFI issues. More info
Update 11.5.12: Thought that the IOS update to version 6.0.1 would fix the wifi problem but this morning I had to solution 1 to get working again. Anybody else still having the problem?
Update 12.19.12: Apple has released iOS 6.0.2 which is supposed to fix â€œa bug that could impact Wi-Fi.â€ Very general but hopefully it will work. I installed it today and only time will tell. http://support.apple.com/kb/DL1621