8820 WiFi Help
 

I just got a 8820 and I am with ATT, but I don't have a data plan. I was able to use the wifi connection on my phone fine when I took it out of the box BEFORE I put my SIM card in. It had no problems detecting my wireless connection at home and getting onto the web.

Then I put my sim card into the phone and now it refuses to connect to any wifi connection. I get a network error message when I try to connect now. Can someone help? I don't understand why it was working when I took it out of the box, but then I put my SIM card in and it stopped. I tried it afterwards without my card and it still won't connect.

Please help! I've already read some of the post and tried deleting my TCP settings, setting the browser to WiFi, etc.