I've had my iPhone since October 11, When I got hams and updated it to 3.1.2 (3GS) the wifi in my home has not worked, when I connected to it it had the little icon on the top left saying full signal, but Internet did not work at all. It can connect to school wifi, but that's all I've tried, o have a comcast router, ip 192.168.0.1 dns 68.87.74.166, 68.87.68.166. I have tried everything, resetting my iPhone setting resetting my router, all except putting it in the freezer, but I don't wanna go that far. If anyone has any good solution to this problem please share it with me.