I'm on ipad 2 64gig wifi 3G version 4.3.3 jailbroken. three weeks ago it my 3G was working fine, and now that I'm back my 3G signal is there but no ip so no Internet. then I checked the apn and that's gone, so I think that's why my 3G isn't working. so how so I get the apn setting back? I tried rebooting, restarting, reset my network settings. still nothing. what do I do now?