I’m hearing reports that WiFi is breaking on iOS 6 updated phones.
The best thing you can do is:
- Forget WiFi Network: Settings->Wifi->(select your network)->Forget This Network
- Restart your iOS device (iPhone, iPad, iPod, etc)
- Log back on your Wi-Fi network
Some people are reporting this is due to a proxy being assigned to your WiFi (it works but you can’t browser in Safari).
Please let me know if this helps, and if not, what does!