Answers: Why would you want to disable the technology and path that your information (email and surfing) rides on?Making it so you only bring back data through wi-fi huh? Well, I'm assuming that you hold your phone unlocked and jailbroken if your worried about that.
You can do it through a program within installer. I believe its called services.app. \ I believe the app let you disable wi-fi, bluetooth and SSH as well.
Good Luckyes if ur phone is unlock and jailbroken u can break open installer and find BossPrefs app. i find this works way better than the service app. once installed in recent times open and turn past its sell-by date edge service.