After I updated my Iphone to the 3.0 I get this message when I try to get on the internet "Could not activate cellular data network. You are not subscribed to a cellular data service" and when I try to get my mail it will say "The connection to the server 'pop3.live.com' failed" I DO HAVE a data plan, can anybody help me. THANK you in advance. I read that if you change the VPN setting to "wap.voicestream.com" (no username/password) it will fix the problem but it doesn't let me save the changes