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Difference between revisions of "Bootrom"
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Please see also [[IBoot|Apple's stage 2 bootloader]], which also uses the "iBoot" name. |
Please see also [[IBoot|Apple's stage 2 bootloader]], which also uses the "iBoot" name. |
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| − | Often users refer to '''old bootrom''' or '''new bootrom''' devices. The '''new bootrom''' devices were released after [[Timeline#September|9 September 2009]] and have the [[0x24000 Segment Overflow]] fixed. Therefore these newer versions of the [[N72ap|iPod touch 2G]] and [[N88ap|iPhone 3GS]] are not vulnerable to this exploit and had only a [[tethered]] [[jailbreak]]/[[unlock]] until [[Spirit]] came out. |
+ | Often users refer to '''old bootrom''' or '''new bootrom''' devices. The '''new bootrom''' devices were released after [[Timeline#September|9 September 2009]] and have the [[0x24000 Segment Overflow]] fixed. Therefore these newer versions of the [[N72ap|iPod touch 2G]] and [[N88ap|iPhone 3GS]] are not vulnerable to this exploit and had only a [[tethered]] [[jailbreak]]/[[unlock]] until [[Spirit]] came out. Currently, these devices can be jailbroken on iOS 4.0 with [[Star]]. |
==Check bootrom version== |
==Check bootrom version== |
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Revision as of 03:00, 3 August 2010
Contents
Introduction / old+new
Please see also Apple's stage 2 bootloader, which also uses the "iBoot" name.
Often users refer to old bootrom or new bootrom devices. The new bootrom devices were released after 9 September 2009 and have the 0x24000 Segment Overflow fixed. Therefore these newer versions of the iPod touch 2G and iPhone 3GS are not vulnerable to this exploit and had only a tethered jailbreak/unlock until Spirit came out. Currently, these devices can be jailbroken on iOS 4.0 with Star.
Check bootrom version
To find out if you have an old or new bootrom, the easiest way is to look at the serial number. If the 4th and 5th digits are lower than 40, then you probably have an old bootrom. If they are higher than 45, then you probably have a new bootrom. These two digits show the production week. For refurbished phones and for numbers inbetween, the result is undefined and you have to make the following exact check.
The exact check to find out which bootrom you have is to put your iPhone 3GS into DFU mode. Double-check your phone is in DFU mode and not in Recovery mode. If you have Mac OS X, go to System Profiler, and under the "Hardware" category, go to USB, and click on "Apple Mobile Device (DFU Mode)." If you have Windows, go to Device Manager, find USB controller, subitem Apple Mobile Device USB Driver. In Properties, Details, select Device Instance Path in the dropdown. The end of the info string will show the bootrom version.
Revisions
S5L8900, used in the iPhone, iPod touch 1G, and iPhone 3G
S5L8720, used in the iPod touch 2G
- iBoot-240.4 "old bootrom"
- iBoot-240.5.1 "new bootrom"
S5L8920, used in the iPhone 3GS
- iBoot-359.3 "old bootrom"
- iBoot-359.3.2 "new bootrom"
