Tethered iPhone jailbreaksWhile requiring a computer, DEFCON badge, or TI-84 calculator to assist an iPod boot is mostly just an inconvenience, requiring the same thing for an iPhone reboot is a major hassle. It means you won't be able to use your iPhone as a cellphone until you can perform the tethered boot. Every time your battery runs out or your system resets due to a software bug or memory exhaustion, you'd need to do a tethered boot to use your phone again.
In order to overcome this obstacle on these very recent devices, a new bootrom exploit will need to be found.
Random pointsThis use of the “tethering” concept has nothing to do with tethering your Mac or PC to the internet via your iPhone
Any new iBoot exploits will always be useful for jailbreaking the actual filesystem. But unless the there's a bootrom exploit that breaks the boot chain of trust, that filesystem won't be bootable without a tethered assist.
Update #1 10/17/2009
We can now confirm that the new 8GB iPod touch is not vulnerable to 24Kpwn. It took just 6 bytes for Apple to fix this:Code:
load_module+16 43 68 LDR R3, [R0,#bdevImg.totalSize]
load_module+18 9A 42 CMP bufsize, R3
load_module+1A 13 D3 BCC FAIL
find_named_image(illb): 000100d8 00024100 696c6c62 696d6733
dataSize totalSize illb img3
Given how small the fix is, it seems likely that it was also applied to that updated bootrom of very recent iPhone 3GS devices. We'll be able to confirm this once we have an actual one of those in hand.
Update #2 10/17/2009Confirmation that the new 8GB iPod touch is at least a tethered jailbreak. This device doesn't require personalized img3 files in the way that the iPhone 3GS and iPod touch 3G do. For this reason, it will “always” be jailbreakable (no need to rush and get your ECID signed hashes like you do for the 3GS and ipt3G). But for the foreseeable future, it will be a tethered jailbreak only.
Update by Dev-Team
กำลังฟาดฟันกันมากในกรณีของการ Unlock Baseband 5.11.07 ระหว่าง Dev-Team กับผู้ท้าชิง iRebsn0w ปัญหามีการกล่าวอ้างจากท่าง iRebsn0w ว่าสามารถพบช่องทางการทำ Unlock ได้แล้วแต่ติดปัญหาบางอย่าง Dev-Team พยายามช่วยเหลือ แต่กับเป็นการเถียงกันโดยปล่าวประโยชน์
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