A new version of the redsn0w jailbreak utility is available from the iPhone Dev Team, according to MuscleNerd, the leader of the hacking pack. The new release includes a handy baseband downgrade option for those who are using the iPad’s 06.15 baseband on iPhone 3G and iPhone 3GS handsets. MuscleNerd explains that people who unlocked with ultrasn0w and updated their iPhone baseband past 05.13.04 will “typically” have the 06.15 baseband.
Even if the user never had 05.13.04 on their device before, redsn0w now makes it possible to downgrade specifically from 06.15 to 05.13.04.
“This gives you the best of both worlds: ultrasn0w compatibility and a normal iPhone baseband with full GPS and the ability to use stock IPSWs again,” according to the iPhone Dev Team leader.
MuscleNerd then proceeds to outline the steps users must take to leverage this functionality in
the new redsn0w 0.9.14 beta 1.
Here are the steps:
1. Use the “Extras->Select IPSW” button in redsn0w to tell it which firmware version you have installed (new-bootrom 3GS users can usually skip this step but it doesn’t hurt for them to do it too).
2. Do a controlled shutdown of your iPhone (“slide to power off”). This step is very important to avoid mount problems when the ramdisk is running!
3. Go back to the first screen and click “Jailbreak”. Enable the “Downgrade from iPad baseband” checkbox, disable Cydia if you already have it installed, and click Next to proceed through the normal DFU ramdisk steps. Users are warned that they’ll encounter a screen that takes a very long time, and MuscleNerd urges them to “just let it be for the next 3-8 minutes! When the ramdisk has done its job it will reboot the phone on its own,” he writes.
iPhone 3G owners looking to update to 06.15 in order to downgrade to 05.13.04 will be able to do so unconditionally.
For 3GS owners, the answer is “maybe.” MuscleNerd has a few more notes on this
on the Dev Team blog.
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