Wi-fi won't connect after updating to iOS5

wi-fi wont connect after updating to iOS5

This is what worked for me:
1. In wireless settings, select your router and then selet "forget this network."
2. Turn wireless off.
3. Hard restart the phone (press power switch and main button simultaneously, hold them until the phone turns off.
4. Reboot your router, preferably unplug the power cord completely.
5. After your router is up and running, turn wireless back on, select your network, then enter your password.
For me, the fix was immediate.  I hope it works for you! 

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