If you're experiencing an issue where the iPhone refuses to access network data (Web pages [Safari reports "Safari can't open the page because it can't find the server."], email, Google Maps data, etc.), the fix may be drop-dead simple:
- Tap Settings
- Tap General
- Tap Reset
- Tap Reset Network Settings
This will cause your iPhone to restart, and will delete any stored Wi-Fi passwords as well as DNS settings and more. It may, however, restore your ability to join a stubborn wireless network, let you access stalled Web pages, or eliminate issues with EDGE data access that can occur for various reasons.