For those of you who do not understand the difference between a tethered and an untethered jailbreak: A tethered jailbreak means that for any reason whatsoever, may it be loss of battery even, your device has to be rebooted, you will have to plug in your device to a computer, launch Redsn0w and select “Just boot tethered right now” meaning that this particular form of jailbreak is not convenient at all, whereas there is no such need of doing this procedure on an untethered jailbreak and you can reboot your device as many times as you want without any hassle. Rebooting on a tethered jailbreak is quite a task, however now it has been made much easier.
Good news is that the iPhone Dev-Team has updated Redsn0w, bringing ‘one click’ support for all of those who are running a tethered jailbreak on iOS 4.2.1, in a bid to make the rebooting process less painstaking.
The iPhone Dev-Team says in their blog:
We’ve updated redsn0w to include “one-click” support for those of you running the tethered 4.2.1 jailbreak. Using command-line arguments, you can now bypass the screens you’d normally see as you use redsn0w to “Just boot tethered for now
The available command line arguments are:
- -j to ask redsn0w to “Just boot now tethered for now”
- -i <filename> to specify your reference IPSW
- -o for old-bootrom iPod touch 2G and iPhone 3GS
- -b <filename> to specify your own boot logo png
For example, to get redsn0w for Mac to do a tethered boot of an iPod touch 4G jailbroken at 4.2.1:
open ~/Desktop/redsn0w.app —args -j -i ~/Desktop/iPod4,1_4.2.1_8C148_Restore.ipsw
This assumes both redsn0w and the IPSW are on your OS X desktop, so modify as necessary! Included in the zip is an example script file that you can double click on to launch redsn0w like this (the Windows example assumes everything is in C:\). (Mac users: please remember to change the permissions of your custom *.command files to allow execution.)
This should help ease the pain of the tethered jailbreak until @comex comes up with a 4.2.1 untether (or for those of you with legit access to the 4.2b3 IPSW, until the “Jailbreak Monte” untether is out of beta)!
Some precautions to keep in mind:
- For best results, upgrade to iTunes 10.1
- If you use Windows 7, run Redsn0w in XP Compatibility Mode
- Make sure you are using a USB 2.0 port.
If you're willing to try Redsn0w 0.9.6rc7b, then download it for Mac OSX and Windows easily from the given links.