jail break 4.0이 나왔다고는 하는데...
We are working hard on a release to our tools that will jailbreak your device (or give you iOS 4 via the jailbreak train) and provide you with a carrier unlock.
Until these tools are released you should hold off on updating your device until we have fully tested our tools with all the relevant devices.
If you rely on hacktivation or a carrier unlock (ultrasn0w) then you should not upgrade until we have fully tested and released our tools.
일단 link는 물고왔는데, 아직은 평이 어떤지 몰라서 깔아보진 못하겠네...보니깐 beta판에서나 되던것 같고.. 쩝;;
아... 시간도 없고.. 귀찮기도하고.. 흠흠..