Recently did a 1.1.1 downgrade to 1.0.2 for a co worker of mine. After the down grade, I used apptap to jailbreak followed by paycay for actavation and youtube. I tested the phone's wifi by downloading some apps from the installer program and it worked fine.

The next day i gave the phone back to my co worker and after she upt in her at&t sim, the phone showed full bars and was working as expected. The problem is she then called me after worl and informed me she was unable to get wifi to work at her house. The wifi icon showed full strength, but she's unable to use safari or anything over wifi. It shows something like safari cannot connect to the server.

My question is this. Since wifi workd at my place, im guessing its some setting problem at her house ? She also has 3 other pcs at her place on wifi and they all appears to work fine. She even told me the router shows the iphone connected, but she is unanle to browse the web or do anything over wifi. Is there some way to troubleshoot the wifi connection ?