Fix iPhone 3 wi-fi connect problem!
Great stuff, because it worked :)
iPhone 3G Users Experience WiFi Problem after Upgrading to iPhone 3.0
1.Turn off Push Email in Settings and restart your iPhone
2.Reset network settings. Touch Settings -> General -> Reset -> Reset Network Settings.
Does the iPhone have a Wi-Fi address listed in Settings> General> About?
iOS: Wi-Fi or Bluetooth settings grayed out or dim
1. Switch to flight mode
2. Switch on wifi
4. Connect wifi, wait for the icon to appear
5. Switch off flight mode
1. go to bluetooth settings and switch on bluetooth
2. wait for the bluetooth icon to come up
3. go to wifi settings and seeif your networks are there.