My Iphone 5 just stopped connecting to my home wifi , and other wifi areas yesterday. I've done almost everything to remedy this: restarting, restarting with hard start, turning modem off (time capsule) and back on again, rebooting phone, reloading phone...... nothing has worked.

What the heck is going on here? Anyone familiar with this, or have a remedy?

iOS: Troubleshooting Wi-Fi networks and connections <-- Link to support.apple.com

Also, in the area titled "If the issue is still unresolved" you can try following instruction #5 to reset all network settings:

Unable to locate a Wi-Fi network

1. Verify that the network is available by tapping Settings > Wi-Fi and choosing from the available networks.Note: It may take a few seconds for the Wi-Fi network name to appear.
2. Move closer to your wireless router (access point) and attempt to locate the Wi-Fi network.
3. If you do not see the network you would like to join, you may be attempting to connect to a hidden network. Learn how to join a hidden network.
4. Supported Wi-Fi configurations vary by iOS device model. Find out which standards your device supports3.
5. Reset network settings by tapping Settings > General > Reset > Reset Network Settings. Note: This will reset all network settings including:
   • previously connected Wi-Fi networks and passwords
   • recently used Bluetooth accessories
   • VPN and APN settings