I recently updated my 3GS to the 4.0 operating system. Now after the update, I cannot use any internet necessary app (Safari, ESPN, E-Mail, etc.) unless I am on WiFi. I have restored my iPhone 2 times already, restarted my phone, reset the network settings and still NOTHING. I have full reception and the 3G logo is visible by the bars, but I cant connect to anything that needs internet. I have no problem calling or receiving text messages. In Safari I have received this message " Safari cannot open this page because the server stopped responding" I had previously jailbroken my iPhone with Cydia and lost the backup from before the jailbreak. I update my phone with OS4 straight from the Jailbreak. Any suggestions? I dont know if this is an AT&T thing or if I should go to Apple on the busiest day of the year (the new 4G release).