DEV-TEAM had just released the PwnageTool 4.0 (Mac version only) to jailbreak iOS4 (iPhone OS 4. Since version 4, iPhone OS changed name to iOS).
Please read carefully before you start to do anything to your iPhone!!!
As of now (23/06/2010), we know that:
- iPhone 2G is NOT SUPPORTED.
- iPod Touch is NOT SUPPORTED.
- iPod Touch 3G is NOT SUPPORTED.
PwnageTool 4.0 only recognizes the official IPSWs that came out on 21/06/2010. If you had developer access to the “4.0 GM” IPSWs, do not try to use those.