The iPhone Dev Team has accused him of stealing their code to create the program, and many in the hacker community instead credit Erica Sadun, a blogger for the Unofficial Apple Weblog.

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Harrison and other iPhone hackers in the iPhone Dev Team community don't intend to profit from their programs, though the iPhone Dev Team does solicit donations on its Web site to fund its research.

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Speakers include Jay Freeman, the creator of Cydia, and the Chronic Dev Team, who developed Absinthe, the jailbreak of the iPhone 4S and the iPad 2.

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The Dev Team, whose research was instrumental in Hotz's initial hacking of the iPhone's hardware, isn't the first to offer a software-only unlock.

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