Settings app -> General -> Reset -> Reset Network SettingsDash Kappei said:What's there to reset tho? VPN is off, wifi is off, 3G Carrier is sets on automatic and I never had to manually change anything. What do you think? :/
Not exactly sure what it does but it does more than just clearing the manual settings and can help mysterious random issues like what you're having. If that doesn't work then try doing a restore to the base software.