Remving EDGE and connecting to WIFI with a password

After I downloaded an update on my first generation IPhone, I have only been able to access the WIFI that doesn't need a password but not password protected ones. I used to be able to access any WIFI as long as I had the password. I also notice that I get E (Edge) on the screen now and I didn't use to get that. I tried removing EDGE but on network settings I don't see an area for cellular data or APN as suggested on several support forums. Please help.