Iphone won't connect to my Airport wireless network?
For some unknown reason, my IPhone 4 won't connect to my home wireless network, set up on an Airport-Extreme A1408 model. i can't quite figure out why?
iPhone 4, Airport - Extreme model A1408
If other wireless devices connect to the AirPort Extreme, you have an iPhone issue, not an AirPort Extreme issue.
Try the iOS Troubleshooting Wi-Fi Networks Guide
http://support.apple.com/kb/TS1398
If no help. please re-post in the iPhone Support Community for a more informed response. We are not iPhone experts in this area.