Currently Being ModeratedNov 13, 2012 8:55 PM (in response to wood3069)
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
If no help. please re-post in the iPhone Support Community for a more informed response. We are not iPhone experts in this area.