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What's the difference between a userland jailbreak and...

S

str0ppy

macrumors regular
Original poster
Jun 27, 2010
110
32
...a bootrom (?) jailbreak?

I'm not sure if it's called a bootrom jailbreak, but if it isn't then I mean the other type which isn't userland.

Can anyone clarify the difference between the two?

My understanding is that with a userland jb even updating iTunes might kill your jailbreak, whearas with Redsn0w, it won't. Surely Redsn0w type jailbreaks are more reliable?

Is there any difference in the overall performance of a jailbroken phone depending on the type of jailbreak used?

As you can probably tell I don't know a great deal about this, but if anyone can help me understand this a bit better I would really appreciate it.

Thanks.
 
the difference is the level of jailbreak. The bootrom exploit is the lowest level and the only way apple can "fix" this is by releasing new hardware, ie like they did with the later 3GS. The userland jailbreak is much higher up, in the OS itself, so apple can easily "fix" this with a software update.
 
Thanks. So surely it's preferential to use a bootrom exploit?

One of the reasons I am asking is that the new Comex jailbreak, whenever that comes out will be userland, but Redsn0w is already available as a beta. I'm wondering if there are any reasons to hold out until the new Dev-Team JB or just use the beta.

Will there be any noticeable difference between the two other than Apple being able to break it more easily?
 
What phone are you using? If it's anything other then an iphone 4 or 3gs w/newer bootrom, then theres no reason you should be waiting. Just jailbreak with redsn0w and go.

Theres no difference between the 2 at the user level, just stuff that goes on behind the scenes. Neither is preferential to a user. And as long as you don't randomly update your phone everytime you plug it into itunes and it says theres a new update available, you'll be fine with any jailbreak.
 
There is no different to you. If you have a 3G or early bootrom 3GS you can use redsn0w. If you have a later 3GS or 4, apple closed the exploit redsn0w uses so you will have to wait for the new spirit jailbreak from comex.

Bootrom exploits are better because (i think this is right not 100%) it means the device is pwned for life, meaning as soon as apple release updated software it is very easy to update the jailbreak. But they are harder to get.

At least that is my basic understanding of it.
 
Brilliant. Thanks for your help everyone.

I wonder if Redsn0w will remain a beta forever?
 
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