Users having a downgraded iPhone 3 / 3GS from 06.15.00 to 05.13.04 or lower baseband have the ability to unlock their gadgets with latest Ultrasn0w and capability to use their GPS functionality.

The very first is improved baseband 06.15.00 downgrading solution, and really should now include most iPhone 3G / iPhone 3GS devices. Keep in mind that any person having an iPhone 3GS that has been produced right after early 2011 — need to stay away from the 06.15.00 baseband. Additionally, thererrrs an easier method for the baseband downgrade.

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The Revised Downgrading Steps are:

  1. Connect your iPhone in normal mode, then click “Jailbreak” after redsn0w identifies its model and BB version (you needn’t pre-select the IPSW anymore).
  2. Choose the “Downgrade from iPad baseband” option (you needn’t worry about de-selecting Cydia anymore).
  3. Do a controlled “slide to power off” shutdown of your phone and proceed through the normal DFU ramdisk steps.

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All one has to do to get this feature is to launch Redsn0w and go to Extras –> Even More -> DFU IPSW.