Problem with wi-fi after updating Nexus S to Android 4 My Nexus S phone doesn't detect any wi-fi networks after the update to Ice Cream Sandwich. 

Any suggestions?
I've just manually updated my GSM T-Mobile Nexus S and it connected automatically to my home wi-fi, I had all the previous settings stored, and I'm also detecting all the wi-fis from my neighbours.

Could you give more details about your issue?