SnOwbreeze, for Windows, is a good tool to jailbreak iOS. Its new update SnOwbreeze 2.7 includes the great capability to jailbreak iOS 4.3.3 untethered. Moreover, the tool is considered as an unofficial PwnageTool and same untethered jailbreak exploit used in implemented in Redsnow tool.  A user can preserve Baseband of device using this amazing tool.