Sep 10, 2009
iPhone OS 3.1 might include some cool features with iTunes 9 such as App management but it might just not be cool if you have a jailbroken iPhone. The latest warning from the Ultrasn0w is that if you are updating to iPhone 3.1 you might not be able to revert back to any of the older versions of iPhone.However, 2G users can still downgrade using pwnage tool 3.01 with the 3.0.1 ipsw.
This is what they have to say:
If you update to Apple’s new software using the normal iTunes process, you will lose your ultrasn0w unlock. In fact you may lose it permanently, because for most people the baseband firmware cannot be reverted to a previous version (unlike the main application CPU firmware).
But don’t worry…our PwnageTool program lets you update your main firmware without touching your baseband firmware, so you can still have the best of both worlds. But you must be diligent about saying “no” to your iTunes request this week to update your firmware.
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