my iphone wont pick up wifi

It won't pick up ANY WiFi, or only your home network? If it is just your home network reboot your router by turning it off or unplugging it from the wall for 30 seconds or so.

If it is all networks that it fails to detect you may have a hardware problem, but see this tip from Apple: http://support.apple.com/kb/TS1559

I had the same problem & I turned my Bluetooth setting off & worked like a charm, hope this helps!

Have same problem sigh......

The solution has already been posted, 2 messages up from yours.