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What is Tethered Jailbroken??
- Thread starter lllll
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iphones have a bootrom called iboot that checks the system during boot and if it finds problems (like jailbreaks) it refuses to boot. when we pwn our phones, we modify the bootrom to ignore that stuff and just boot the device.
the newer bootrom is immune to the "24kpwn" exploit that we used on the previous one to modify it, so we can not permanently modify it. to get around this, they have found another exploit that works temporarily. over usb.
so every time you boot your phone, you have to do the same exploit with your device to get it to boot. so when they say "tethered" what they mean is that your device can't boot without being connected (or tethered) to your computer.
after it's booted, you can disconnect it. if you try to reboot your device, it will not be able to start without you connecting it to your computer and running whatever program boots these devices.
the newer bootrom is immune to the "24kpwn" exploit that we used on the previous one to modify it, so we can not permanently modify it. to get around this, they have found another exploit that works temporarily. over usb.
so every time you boot your phone, you have to do the same exploit with your device to get it to boot. so when they say "tethered" what they mean is that your device can't boot without being connected (or tethered) to your computer.
after it's booted, you can disconnect it. if you try to reboot your device, it will not be able to start without you connecting it to your computer and running whatever program boots these devices.
Sure, here ya go:
http://en.wikipedia.org/wiki/Jailbreak_(iPhone_OS)
Tethered just means attached via USB cable.
So if your battery runs out, or you need to reboot because of an error, or a Cydia app install, you have to have the computer and USB cable at hand in order to get the phone running again. Not a very viable option.
If it were that simple, why does Apple not release a software update to change the bootrom, rather than release a new hardware revision with a new bootrom resistant to current exploits?
I don't know much on how jailbreaking works, but if it's ROM I'm pretty sure it can't be changed.
On topic, bottom line is if you've got a tethered Jailbreak and turn it off, the Jailbreak is gone.
I am far from an expert, but when I used to use PPC's, we could build a custom ROM (deleting the crap we didn't want to use) so as to speed up the PPC and allow more free storage space.
That said, I don't know if anything similar is possible on the iPhone. Aren't we sort of doing this with Pwnage Tool when we mod the firmware to remove the baseband updates ??
It's not a software update, but Apple DID update the bootrom.
https://www.macrumors.com/2009/10/1...sed-iphone-3gs-models-to-hinder-jailbreaking/
It's not a software update, but Apple DID update the bootrom.
https://www.macrumors.com/2009/10/1...sed-iphone-3gs-models-to-hinder-jailbreaking/
I know. Look at my post, I mentioned the new hardware revisions
I know. Look at my post, I mentioned the new hardware revisions
Yikes, I re-read. My apologies. I should finish my morning coffee before posting.
Do you want a phone or an iPod?
The tethering you are hearing about just means that if there is no wifi around you can use your phone as a modem.
Actually, there're two senses of "tethering" being used -- one is to use iphone as a modem, the other is to connect iphone or ipod touch to a computer through USB to boot it up. In this thread we are talking about the second meaning.
ROM cannot be changed... easily... Look at what's going on with Modding the Wii right now. There is a way to write into empty places in the ROM yes, but flashing the entire ROM, like Nintendo has tried to do, has caused some bad issues with Modded and Unmodded users.
This is why Apple doesn't just release software updates to close the Boot ROM exploits.
ROM can be changed. Not easily, but it can be changed. Read-only memory means it was only meant to be read from, not modified or written to. Not to say that it can't.