Q: Which devices and firmware versions are supported?
A: In this initial release, the following configurations are supported:
- iPad1: 4.3 through 4.3.3
- iPad2: 4.3.3
- iPhone3GS: 4.3 through 4.3.3
- iPhone4: 4.3 through 4.3.3
- iPhone4-CDMA: 4.2.6 through 4.2.8
- iPod touch 3g: 4.3, 4.3.2, 4.3.3
- iPod touch 4g: 4.3 through 4.3.3
Q: How does jbme3.0 differ from the existing jailbreaks?
A: jbme3.0 is entirely userland-based, from start to finish. Â The A5 chip in the iPad2 has no iBoot or bootrom-level exploits yet, so tools like redsn0w, PwnageTool and sn0wbreeze canâ€™t use the limera1n bootrom exploit to inject the jailbreak. Even for those devices where limera1n works, jbme3.0 injects the jailbreak with a userland exploit.
Q: If Iâ€™m already jailbroken on the latest firmware, is there any advantage to jailbreaking again?
A: No, but you should consider showing this to your friends! Â Spread the jailbreaking fever.
Q: Are the holes exploited by jbme3.0 closed in iOS5?
A: The holes still exist in the iOS5 betas, but theyâ€™ll almost certainly be fixed by the time iOS5 is public. Â However because the iPad2 had no public jailbreak yet, it probably wasnâ€™t worth waiting until the fall to use them. Â If history repeats itself though, there will be more holes and exploits.
Q: Will I permanently lose the jailbreak if I need to restore my device?
A: For all except the iPad2, saving your SHSH blobs should let you always restore your device to iOS versions where this jailbreak works. Â The iPad2 is a little more complicated. Â If you have a wifi-only iPad2 and saved SHSH blobs, youâ€™re in good shape. Â But if you have the GSM or CDMA iPad2, you wonâ€™t be able to restore to 4.3.3 or lower once Apple stops signing its baseband. Â There are a few ideas that might work to get around this limitation, but for now itâ€™s best to assume thereâ€™s no going back to 4.3.3 once 4.3.4 is out for iPad2 GSM or CDMA owners.
Q: I heard this new unionfs stuff is dangerous?
A: Define dangerous 🙂 Â Seriously though, although unionfs is a huge improvement to the install time of the jailbreak, it is brand new code and there is the possibility something will go wrong. Â Just keep regular backups of your media and content and you should be fine. Â If there are any problems, they should appear within the first few days, so hold off and let â€œeveryone elseâ€ test the waters if youâ€™d like.
Thanks to the iPhone Dev Team for providing answers to these detailed questions. Well done to comex and everyone!