I have a non jail-broken iphone4 with AT@T and an jail-broken iphone 3g that is not hooked up to any phone company. In my condo I have wifi and both my phones operate perfectly in terms of the internet. My girlfriend has the same wifi provider in her condo and I took my iphone 3g over there. It appeared that I signed into the internet perfectly; it show the wifi symbol to the right of "no service" and it shows me signed into her wifi in "settings". But it is not working. It does not show new mail and responds "the mail server "pop3.live.com" is not responding. Verify that you have entered the correct account into in mail settings." When I click my stock icon the response is "network unavailable". Bloomberg show "no internet connection". I cannot access the internet. What am I doing wrong? My iphone4 is also hooked up to her wifi and works perfectly in both locations.