not able to detect WiFi network after JB.

On a JB iPhone4 I have trouble connecting to WPA Enterprise wifi. Very strange

 

Try restoring to vanilla and see if that works. If it doesn't then make an appointment at the Apple store because it's not JB.

 

What kind of error are you getting? Is it saying its can't verify the security certificate (or something along those lines)? If so then turn auto fill off for Safari. You will still get that error but you should be able to connect.

Hope that works for you!

 

Do a reset network settings. If it does not work on the first one, do it again. It will come back...

 

What happens is the network page says I'm connected but the 3G symbol never changes to the Wifi symbol. I get an IP but can't browse to anything. Very strange. I have tried resetting the network settings numerous times. Just recently it started to connect but not all the time. Weird.

 

This happens to me on occasions too.

Glad i'm not the only one now but a solution would be nice other then having to reboot the handset when the problem occurs.

 

I get this with WPA security set on my router. It works fine til I leave the house, when I return and the phones try to reconnect to the wifi it doesnt work and the phone needs to be rebooted. I changed the router security to WEP and dont get the problem anymore.