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MuscleNerd, member of the iPhone Dev Team has revealed that baseband – 04.10.01 that comes bundled with iOS 4.3 for iPhone 4 is vulnerable, which indicates that it can be unlocked if Apple does not update it in the final version.
MuscleNerd revealed this news via the following tweet:
Current i4 unlock goal includes til 04.10.01 (4.3b3). Very weird situation…vuln cmds are there, trying to invoke them!