This Blacksn0w port is based on modified binaries by msft.guy and the original Blacksn0w unlock released by Geohot.
The port is still buggy and one needs to re-apply the patched files every time the iPhone is rebooted.
veencee, one of the iPhone users who tried it out has posted a video as a proof of concept to show that Blacksn0w was successfully ported to unlock iPhone 3GS running iPhone OS 4.0 Beta 4:
This is not the perfect unlocking solution for iPhone users as it can only unlock baseband 05.11.07 that was included in iPhone OS 3.1.2. The latest beta version of iPhone OS 4.0 also includes a new baseband. So if users want to unlock your iPhone, they’ll need to preserve the baseband using tools like iPhone Dev team’s PwnageTool.
The iPhone hacking community haven’t released a tool to unlock baseband 05.12.01 that was included in iPhone OS 3.1.3.
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