Here is a list of the iPhone firmware versions and their matching basebands...
- 2.0.0 Firmware & 01.45.00 Baseband
- 2.0.1 Firmware & 01.48.02 Baseband
- 2.0.2 Firmware & 02.08.01 Baseband
- 2.1.0 Firmware & 02.11.07 Baseband
- 2.2.0 Firmware & 02.28.00 Baseband

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iPhone [1.0.2 OTB]Unlocked -->1.1.3 ziphone -->1.1.4 iLiberty -->1.1.4 WinPwn 1.0 -->2.0 WinPwn 2.0 --> WinPwn 2.2 --> Yellowsn0w 2.2
iPhone is the best cellphone I ever used