MuscleNerd: Unlock for iPhone OS 3.1.3 Baseband 05.12.01 Coming Soon
One of the followers asked MuscleNerd on Twitter, whether an unlock for iPhone OS 3.1.3 baseband 05.12.01 will be launched when the iPhone 4G will launch, and MuscleNerd came up with a positive reply.
MuscleNerd also reminded users, not to straightaway accept firmware updates, and wait for the release of unlock and jailbreak for that update.
This is how the original conversation went:

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[...] upcoming unlock will work for all basebands for iPhone 3G/3GS, till date. However, MuscleNerd has promised the release of a new unlock in this month, but still it is advised not to update to [...]