I was try smolik's Tethered jailbreak on my i4 32GB (model 3.1) and it's working BiteSMS and Activator dont work (put i4 in Safe mode)... I have: iFile, CCNowPlaying, afc2add, Applist, AppSync 7, Bootstrap, Erica Utilities, HiddenSettings7, Hipstore, Ipa Instaler, Multitaskinggesture, NoAdStoreOpen, OpenSSH, PreferenceLoader, Substrate Safe Mode, SwipeSelection,Wifi Booster.